Bump the dependencies with 3 updates (#42626)

Bumps the development-dependencies group with 3 updates in the / directory: [autoprefixer](https://github.com/postcss/autoprefixer), [postcss](https://github.com/postcss/postcss) and [prettier](https://github.com/prettier/prettier).


Updates `autoprefixer` from 10.5.1 to 10.5.2
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/main/CHANGELOG.md)
- [Commits](postcss/autoprefixer@10.5.1...10.5.2)

Updates `postcss` from 8.5.15 to 8.5.16
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.15...8.5.16)

Updates `prettier` from 3.8.4 to 3.9.4
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.8.4...3.9.4)

---
updated-dependencies:
- dependency-name: autoprefixer
  dependency-version: 10.5.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
- dependency-name: postcss
  dependency-version: 8.5.16
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
- dependency-name: prettier
  dependency-version: 3.9.4
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -129,7 +129,7 @@
     "astro": "5.18.2",
     "astro-auto-import": "^0.5.1",
     "astro-broken-links-checker": "^1.1.0",
-    "autoprefixer": "^10.5.1",
+    "autoprefixer": "^10.5.2",
     "bundlewatch": "^0.4.2",
     "clean-css-cli": "^5.6.3",
     "clipboard": "^2.0.11",
@@ -163,9 +163,9 @@
     "mime": "^4.1.0",
     "nodemon": "^3.1.14",
     "npm-run-all2": "^9.0.2",
-    "postcss": "^8.5.12",
+    "postcss": "^8.5.16",
     "postcss-cli": "^11.0.1",
-    "prettier": "^3.8.4",
+    "prettier": "^3.9.4",
     "prettier-plugin-astro": "^0.14.1",
     "rehype-autolink-headings": "^7.1.0",
     "remark": "^15.0.1",