meta: bump postcss-import from 15.1.0 to 16.0.0

Bumps [postcss-import](https://github.com/postcss/postcss-import) from 15.1.0 to 16.0.0.
- [Release notes](https://github.com/postcss/postcss-import/releases)
- [Changelog](https://github.com/postcss/postcss-import/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-import@15.1.0...16.0.0)

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

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

package.json

@@ -69,7 +69,7 @@
     "next-themes": "~0.2.1",
     "postcss": "~8.4.30",
     "postcss-calc": "~9.0.1",
-    "postcss-import": "~15.1.0",
+    "postcss-import": "~16.0.0",
     "postcss-mixins": "~9.0.4",
     "postcss-simple-vars": "~7.0.1",
     "react": "^18.2.0",