build(deps-dev): bump postcss-import from 16.1.0 to 16.1.1 in /frontend

Bumps [postcss-import](https://github.com/postcss/postcss-import) from 16.1.0 to 16.1.1.
- [Release notes](https://github.com/postcss/postcss-import/releases)
- [Changelog](https://github.com/postcss/postcss-import/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-import@16.1.0...16.1.1)

---
updated-dependencies:
- dependency-name: postcss-import
  dependency-version: 16.1.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -70,7 +70,7 @@
     "msw": "^2.10.2",
     "msw-storybook-addon": "^2.0.5",
     "postcss": "^8.5.5",
-    "postcss-import": "^16.1.0",
+    "postcss-import": "^16.1.1",
     "postcss-nesting": "^13.0.2",
     "rimraf": "^6.0.1",
     "storybook": "^9.0.1",