Bump postcss from 8.4.49 to 8.5.1

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.49 to 8.5.1.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.49...8.5.1)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -52,7 +52,7 @@
     "karma-webpack": "^5.0.1",
     "mini-css-extract-plugin": "^2.9.2",
     "moment": "^2.30.1",
-    "postcss": "^8.4.49",
+    "postcss": "^8.5.1",
     "prettier": "^3.4.2",
     "style-loader": "^4.0.0",
     "vue-loader": "^15.11.1",