chore(deps): bump postcss and postcss-font-magician

Bumps [postcss](https://github.com/postcss/postcss) to 8.4.47 and updates ancestor dependency [postcss-font-magician](https://github.com/csstools/postcss-font-magician). These dependencies need to be updated together.


Updates `postcss` from 4.1.16 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@4.1.16...8.4.47)

Updates `postcss-font-magician` from 3.0.0 to 4.0.0
- [Release notes](https://github.com/csstools/postcss-font-magician/releases)
- [Changelog](https://github.com/csstools/postcss-font-magician/blob/main/CHANGELOG.md)
- [Commits](csstools/postcss-font-magician@v3.0.0...v4.0.0)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
- dependency-name: postcss-font-magician
  dependency-type: direct:development
...

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

package.json

@@ -76,7 +76,7 @@
     "mini-css-extract-plugin": "^2.9.0",
     "npm-run-all": "^4.1.5",
     "postcss": "^8.4.38",
-    "postcss-font-magician": "^3.0.0",
+    "postcss-font-magician": "^4.0.0",
     "postcss-loader": "^7.3.4",
     "prettier": "^3.3.3",
     "sass": "^1.77.4",