Merge pull request #71 from jenkinsci/dependabot/npm_and_yarn/postcss-8.4.1

Bump postcss from 8.3.11 to 8.4.1

Author: uhafner

package-lock.json

@@ -12,7 +12,7 @@
     "cross-env": "^7.0.3",
     "rtlcss": "^3.5.0",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.3.8",
+    "postcss": "^8.4.1",
     "postcss-cli": "^9.0.2",
     "remark-cli": "^10.0.1",
     "remark-lint": "^9.1.0",