lint:stylelint also checking scss

Needed to comply with https://mantine.dev/styles/sass/#usage-with-nextjs

package.json

@@ -9,7 +9,7 @@
     "start": "next start",
     "typecheck": "tsc --noEmit",
     "lint": "next lint && npm run lint:stylelint",
-    "lint:stylelint": "stylelint '**/*.css' --cache",
+    "lint:stylelint": "stylelint '**/*.*.{css,scss}' --cache",
     "jest": "jest",
     "jest:watch": "jest --watch",
     "prettier:check": "prettier --check \"**/*.{ts,tsx}\"",