cli: provide prettier config

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

microsite/package.json

@@ -17,7 +17,7 @@
     "version": "docusaurus-version",
     "write-translations": "docusaurus-write-translations"
   },
-  "prettier": "@spotify/prettier-config",
+  "prettier": "@backstage/cli/config/prettier",
   "dependencies": {
     "@docusaurus/core": "^3.1.1",
     "@docusaurus/plugin-client-redirects": "^3.1.1",
@@ -38,7 +38,6 @@
   "devDependencies": {
     "@docusaurus/module-type-aliases": "^3.1.1",
     "@docusaurus/tsconfig": "^3.1.1",
-    "@spotify/prettier-config": "^15.0.0",
     "@types/luxon": "^3.0.0",
     "@types/webpack-env": "^1.18.0",
     "js-yaml": "^4.1.0",