Bump postcss from 8.5.13 to 8.5.14 in /web-client

Bumps [postcss](https://github.com/postcss/postcss) from 8.5.13 to 8.5.14.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.5.13...8.5.14)

---
updated-dependencies:
- dependency-name: postcss
  dependency-version: 8.5.14
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

web-client/package.json

@@ -42,7 +42,7 @@
     "eslint-plugin-unused-imports": "4.4.1",
     "eslint-plugin-wc": "3.1.0",
     "globals": "^17.6.0",
-    "postcss": "^8.5.13",
+    "postcss": "^8.5.14",
     "prettier": "^3.8.3",
     "tailwindcss": "^4.2.4",
     "typescript": "~6.0.3",