Bump postcss from 8.4.49 to 8.5.1

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.49 to 8.5.1.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.49...8.5.1)

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

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

Author: dependabot[bot]

package.json

@@ -17,7 +17,7 @@
     "d3": "^7.9.0",
     "next": "^15.1.0",
     "next-auth": "4.24.11",
-    "postcss": "8.4.49",
+    "postcss": "8.5.1",
     "react": "18.3.1",
     "react-dom": "18.3.1",
     "tailwindcss": "3.4.16",