build(deps): bump baseline-browser-mapping in /website (#24908)

Bumps [baseline-browser-mapping](https://github.com/web-platform-dx/baseline-browser-mapping) from 2.9.19 to 2.11.21.
- [Release notes](https://github.com/web-platform-dx/baseline-browser-mapping/releases)
- [Commits](web-platform-dx/baseline-browser-mapping@v2.9.19...v2.11.21)

---
updated-dependencies:
- dependency-name: baseline-browser-mapping
  dependency-version: 2.11.21
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

website/yarn.lock

@@ -2774,9 +2774,9 @@ base16@^1.0.0:
   integrity sha512-pNdYkNPiJUnEhnfXV56+sQy8+AaPcG3POZAUnwr4EeqCUZFz4u2PePbo3e5Gj4ziYPCWGUZT9RHisvJKnwFuBQ==
 
 baseline-browser-mapping@^2.9.0:
-  version "2.9.19"
-  resolved "https://registry.yarnpkg.com/baseline-browser-mapping/-/baseline-browser-mapping-2.9.19.tgz#3e508c43c46d961eb4d7d2e5b8d1dd0f9ee4f488"
-  integrity sha512-ipDqC8FrAl/76p2SSWKSI+H9tFwm7vYqXQrItCuiVPt26Km0jS+NzSsBWAaBusvSbQcfJG+JitdMm+wZAgTYqg==
+  version "2.11.21"
+  resolved "https://registry.yarnpkg.com/baseline-browser-mapping/-/baseline-browser-mapping-2.11.21.tgz#99af73cb8e54007e4f5345e132278e26c2662f2c"
+  integrity sha512-uh8vpY/1/YyFkunIDFH/12p7/7VdPKA1hejMVEbdkEaWnUz0Hesvx5EbiU6XxjyHZIOju+ZMbQJkRh+es3/spQ==
 
 batch@0.6.1:
   version "0.6.1"