chore(deps-dev): bump @tailwindcss/postcss in /frontend (#2541)

Bumps [@tailwindcss/postcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/@tailwindcss-postcss) from 4.2.4 to 4.3.2.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.3.2/packages/@tailwindcss-postcss)

---
updated-dependencies:
- dependency-name: "@tailwindcss/postcss"
  dependency-version: 4.3.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -62,7 +62,7 @@
     "tailwind-merge": "^3.6.0"
   },
   "devDependencies": {
-    "@tailwindcss/postcss": "^4.2.4",
+    "@tailwindcss/postcss": "^4.3.2",
     "@types/d3-force": "^3.0.10",
     "@types/lodash": "^4.17.20",
     "@types/react": "^19.2.14",