build(deps-dev): bump the development-dependencies group with 2 updates

Bumps the development-dependencies group with 2 updates: [postcss](https://github.com/postcss/postcss) and [prettier](https://github.com/prettier/prettier).


Updates `postcss` from 8.5.8 to 8.5.9
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.8...8.5.9)

Updates `prettier` from 3.8.1 to 3.8.2
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.8.1...3.8.2)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
- dependency-name: prettier
  dependency-version: 3.8.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

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

Author: dependabot[bot]

package-lock.json

@@ -56,9 +56,9 @@
     "eslint": "^10.2.0",
     "eslint-plugin-compat": "^7.0.1",
     "globals": "^17.4.0",
-    "postcss": "^8.5.8",
+    "postcss": "^8.5.9",
     "postcss-cli": "^11.0.1",
-    "prettier": "^3.8.1",
+    "prettier": "^3.8.2",
     "xo": "^2.0.1"
   },
   "browserslist": [