Merge pull request #541 from jenkinsci/renovate/postcss-8.x

Bump dependency postcss to v8.5.26

Author: uhafner

package-lock.json

@@ -15,7 +15,7 @@
     "rtlcss": "4.3.0",
     "sass": "1.102.0",
     "npm-run-all2": "9.0.2",
-    "postcss": "8.5.25",
+    "postcss": "8.5.26",
     "postcss-cli": "11.0.1",
     "remark-cli": "12.0.1",
     "remark-lint": "10.0.1",