Bump image-size from 1.1.1 to 1.2.1 in /docs

Bumps [image-size](https://github.com/image-size/image-size) from 1.1.1 to 1.2.1.
- [Release notes](https://github.com/image-size/image-size/releases)
- [Commits](image-size/image-size@v1.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: image-size
  dependency-version: 1.2.1
  dependency-type: indirect
...

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

Author: dependabot[bot]

docs/yarn.lock

@@ -7172,13 +7172,13 @@ __metadata:
   linkType: hard
 
 "image-size@npm:^1.0.2":
-  version: 1.1.1
-  resolution: "image-size@npm:1.1.1"
+  version: 1.2.1
+  resolution: "image-size@npm:1.2.1"
   dependencies:
     queue: 6.0.2
   bin:
     image-size: bin/image-size.js
-  checksum: 23b3a515dded89e7f967d52b885b430d6a5a903da954fce703130bfb6069d738d80e6588efd29acfaf5b6933424a56535aa7bf06867e4ebd0250c2ee51f19a4a
+  checksum: 8601ddd4edc1db16f097f5cf585c23214e29c3b8f4d8a8f8d59b8e3bae2338c8a5073236bfff421d8541091a98a38b802ed049203c745286a69d1aac4e5bc4c7
   languageName: node
   linkType: hard