Update dependency html-proofer to v5.1.1 (#18)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [html-proofer](https://redirect.github.com/gjtorikian/html-proofer) |
`5.0.10` -> `5.1.1` |
[![age](https://developer.mend.io/api/mc/badges/age/rubygems/html-proofer/5.1.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/rubygems/html-proofer/5.0.10/5.1.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>gjtorikian/html-proofer (html-proofer)</summary>

###
[`v5.1.1`](https://redirect.github.com/gjtorikian/html-proofer/blob/HEAD/CHANGELOG.md#v511---17-11-2025)

[Compare
Source](https://redirect.github.com/gjtorikian/html-proofer/compare/v5.1.0...v5.1.1)

**Full Changelog**:
<gjtorikian/html-proofer@v5.1.0...v5.1.1>

###
[`v5.1.0`](https://redirect.github.com/gjtorikian/html-proofer/blob/HEAD/CHANGELOG.md#v510---03-11-2025)

[Compare
Source](https://redirect.github.com/gjtorikian/html-proofer/compare/v5.0.10...v5.1.0)

#### What's Changed

- Bump actions/checkout from 4 to 5 by
[@&#8203;dependabot](https://redirect.github.com/dependabot)\[bot] in
[#&#8203;857](https://redirect.github.com/gjtorikian/html-proofer/pull/857)
- Add to Gemfile by
[@&#8203;denisdefreyne](https://redirect.github.com/denisdefreyne) in
[#&#8203;858](https://redirect.github.com/gjtorikian/html-proofer/pull/858)
- Remove outdated real-world examples by
[@&#8203;denisdefreyne](https://redirect.github.com/denisdefreyne) in
[#&#8203;859](https://redirect.github.com/gjtorikian/html-proofer/pull/859)
- Allow support for multiple directory index files by
[@&#8203;denisdefreyne](https://redirect.github.com/denisdefreyne) in
[#&#8203;860](https://redirect.github.com/gjtorikian/html-proofer/pull/860)

#### New Contributors

- [@&#8203;denisdefreyne](https://redirect.github.com/denisdefreyne)
made their first contribution in
[#&#8203;858](https://redirect.github.com/gjtorikian/html-proofer/pull/858)

**Full Changelog**:
<gjtorikian/html-proofer@v5.0.10...v5.1.0>

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/f18m/f18m.github.io).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xNTkuNCIsInVwZGF0ZWRJblZlciI6IjQxLjE3My4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Gemfile.lock

@@ -5,24 +5,28 @@ GEM
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     afm (0.2.2)
-    async (2.19.0)
+    async (2.34.0)
       console (~> 1.29)
       fiber-annotation
-      io-event (~> 1.6, >= 1.6.5)
+      io-event (~> 1.11)
+      metrics (~> 0.12)
+      traces (~> 0.18)
     base64 (0.2.0)
-    bigdecimal (3.1.9)
+    benchmark (0.5.0)
+    bigdecimal (3.3.1)
     colorator (1.1.0)
     concurrent-ruby (1.3.5)
-    console (1.29.3)
+    console (1.34.2)
       fiber-annotation
       fiber-local (~> 1.1)
       json
     csv (3.3.5)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
-    ethon (0.16.0)
+    ethon (0.18.0)
       ffi (>= 1.15.0)
+      logger
     eventmachine (1.2.7)
     faraday (2.13.4)
       faraday-net_http (>= 2.0, < 3.5)
@@ -34,15 +38,16 @@ GEM
     fiber-annotation (0.2.0)
     fiber-local (1.1.0)
       fiber-storage
-    fiber-storage (1.0.0)
+    fiber-storage (1.0.1)
     forwardable-extended (2.6.0)
     google-protobuf (4.30.2-x86_64-linux)
       bigdecimal
       rake (>= 13)
     hashery (2.1.2)
-    html-proofer (5.0.10)
+    html-proofer (5.1.1)
       addressable (~> 2.3)
       async (~> 2.1)
+      benchmark (~> 0.5)
       nokogiri (~> 1.13)
       pdf-reader (~> 2.11)
       rainbow (~> 3.0)
@@ -52,7 +57,7 @@ GEM
     http_parser.rb (0.8.0)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    io-event (1.7.5)
+    io-event (1.14.2)
     jekyll (4.4.1)
       addressable (~> 2.4)
       base64 (~> 0.2)
@@ -87,7 +92,7 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.10.2)
+    json (2.16.0)
     kramdown (2.5.1)
       rexml (>= 3.3.9)
     kramdown-parser-gfm (1.1.0)
@@ -98,7 +103,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     logger (1.7.0)
     mercenary (0.4.0)
-    mini_portile2 (2.8.8)
+    metrics (0.15.0)
     minima (2.5.2)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
@@ -112,17 +117,16 @@ GEM
       jekyll-sitemap (~> 1.3)
     net-http (0.6.0)
       uri
-    nokogiri (1.16.8)
-      mini_portile2 (~> 2.8.2)
+    nokogiri (1.18.10-x86_64-linux-gnu)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    pdf-reader (2.13.0)
+    pdf-reader (2.15.0)
       Ascii85 (>= 1.0, < 3.0, != 2.0.0)
-      afm (~> 0.2.1)
+      afm (>= 0.2.1, < 2)
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
@@ -144,6 +148,7 @@ GEM
       faraday (>= 0.17.3, < 3)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
+    traces (0.18.2)
     ttfunk (1.8.0)
       bigdecimal (~> 3.1)
     typhoeus (1.4.1)
@@ -152,7 +157,7 @@ GEM
     uri (1.0.3)
     webrick (1.9.1)
     yell (2.2.2)
-    zeitwerk (2.7.2)
+    zeitwerk (2.7.3)
 
 PLATFORMS
   x86_64-linux-gnu