chore: bump postcss-nesting from 13.0.0 to 14.0.0

Bumps [postcss-nesting](https://github.com/csstools/postcss-plugins/tree/HEAD/plugins/postcss-nesting) from 13.0.0 to 14.0.0.
- [Changelog](https://github.com/csstools/postcss-plugins/blob/main/plugins/postcss-nesting/CHANGELOG.md)
- [Commits](https://github.com/csstools/postcss-plugins/commits/HEAD/plugins/postcss-nesting)

---
updated-dependencies:
- dependency-name: postcss-nesting
  dependency-version: 14.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -82,7 +82,7 @@
     "npm-run-all": "^4.1.5",
     "postcss-cli": "^11.0.0",
     "postcss-import": "^16.1.0",
-    "postcss-nesting": "^13.0.0",
+    "postcss-nesting": "^14.0.0",
     "prettier": "^3.2.5",
     "rimraf": "^6.1.0",
     "rollup": "^4.17.2",