build(deps): bump postcss in the dependencies group

Bumps the dependencies group with 1 update: [postcss](https://github.com/postcss/postcss).


Updates `postcss` from 8.4.45 to 8.4.47
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.45...8.4.47)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -22,7 +22,7 @@
     "firebase": "^10.13.1",
     "firebase-admin": "^12.5.0",
     "next": "^14.2.11",
-    "postcss": "^8.4.45",
+    "postcss": "^8.4.47",
     "react": "^18.3.1",
     "react-async-hook": "^4.0.0",
     "react-beautiful-dnd": "^13.1.1",