chore(quickstart): replace spotify/prettier-config with backstage/cli/prettier-config (#2910)

Signed-off-by: Christoph Jerolimov <jerolimov+git@redhat.com>

Author: christoph-jerolimov

workspaces/quickstart/package.json

@@ -58,7 +58,7 @@
     "@types/react-dom": "^18",
     "refractor@npm:3.6.0/prismjs": "^1.30.0"
   },
-  "prettier": "@spotify/prettier-config",
+  "prettier": "@backstage/cli/config/prettier",
   "lint-staged": {
     "*.{js,jsx,ts,tsx,mjs,cjs}": [
       "eslint --fix",