Bump @primer/css from 21.5.1 to 22.0.0

Bumps [@primer/css](https://github.com/primer/css) from 21.5.1 to 22.0.0.
- [Release notes](https://github.com/primer/css/releases)
- [Changelog](https://github.com/primer/css/blob/main/CHANGELOG.md)
- [Commits](primer/css@v21.5.1...v22.0.0)

---
updated-dependencies:
- dependency-name: "@primer/css"
  dependency-version: 22.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -26,7 +26,7 @@
     "typescript": "5.8.3"
   },
   "dependencies": {
-    "@primer/css": "21.5.1",
+    "@primer/css": "22.0.0",
     "@primer/octicons-react": "19.15.2",
     "@primer/primitives": "10.7.0",
     "@primer/view-components": "0.43.1",