Update dependency @primer/css to v21.0.2 (#204)

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

Author: renovate[bot]

package.json

@@ -141,7 +141,7 @@
     "package.json": "pnpm sort-package-json"
   },
   "dependencies": {
-    "@primer/css": "21.0.1",
+    "@primer/css": "21.0.2",
     "@primer/primitives": "7.11.10",
     "@primer/view-components": "0.1.9",
     "highlight.js": "11.8.0",