build(deps-dev): Bump postcss-import from 14.1.0 to 15.1.0

Bumps [postcss-import](https://github.com/postcss/postcss-import) from 14.1.0 to 15.1.0.
- [Release notes](https://github.com/postcss/postcss-import/releases)
- [Changelog](https://github.com/postcss/postcss-import/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-import@14.1.0...15.1.0)

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

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

package.json

@@ -170,7 +170,7 @@
     "nx": "16.7.4",
     "patch-package": "^6.4.7",
     "postcss": "^8.3.9",
-    "postcss-import": "14.1.0",
+    "postcss-import": "15.1.0",
     "postcss-preset-env": "7.5.0",
     "postcss-url": "10.1.3",
     "prettier": "2.8.8",