Merge pull request #2056 from umputun/dependabot/npm_and_yarn/frontend/postcss-8.5.10

chore(deps-dev): bump postcss from 8.4.14 to 8.5.10 in /frontend

frontend/apps/remark42/package.json

@@ -106,7 +106,7 @@
     "jest-localstorage-mock": "^2.4.21",
     "mini-css-extract-plugin": "^2.6.1",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.4.14",
+    "postcss": "^8.5.10",
     "postcss-html": "^1.4.1",
     "postcss-loader": "^7.0.0",
     "postcss-preset-env": "^7.7.2",