build(deps): bump postcss from 8.5.26 to 8.5.28

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.26 to 8.5.28.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.26...8.5.28)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.28
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

apps/web/package.json

@@ -12,7 +12,7 @@
   "dependencies": {
     "lucide-react": "^1.33.0",
     "next": "^16.3.1",
-    "postcss": "^8.5.26",
+    "postcss": "^8.5.28",
     "react": "^19.2.8",
     "react-dom": "^19.2.8",
     "simple-icons": "^16.26.0"