build(deps-dev): bump tailwindcss from 3.4.11 to 3.4.15 in /frontend

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 3.4.11 to 3.4.15.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/v3.4.15/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/compare/v3.4.11...v3.4.15)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

frontend/package.json

@@ -60,7 +60,7 @@
     "postcss": "^8.4.41",
     "prettier": "^3.3.3",
     "prettier-plugin-tailwindcss": "^0.6.8",
-    "tailwindcss": "^3.4.11",
+    "tailwindcss": "^3.4.15",
     "typescript": "^5.6.2",
     "vite": "^5.4.6",
     "vite-plugin-svgr": "^4.2.0"