Bump nokogiri from 1.13.3 to 1.13.6

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.13.3 to 1.13.6.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/v1.13.6/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.13.3...v1.13.6)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -232,12 +232,12 @@ GEM
       jekyll-seo-tag (~> 2.1)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    nokogiri (1.13.3)
+    nokogiri (1.13.6)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogiri (1.13.3-x64-mingw32)
+    nokogiri (1.13.6-x64-mingw32)
       racc (~> 1.4)
-    nokogiri (1.13.3-x86_64-darwin)
+    nokogiri (1.13.6-x86_64-darwin)
       racc (~> 1.4)
     octokit (4.22.0)
       faraday (>= 0.9)