fix(package.json): use correct pnpm version

Author: Tschuck

Diff for: package.json

@@ -54,6 +54,7 @@
     "vite": "^5.1.7"
   },
   "name": "website-editor",
+  "packageManager": "[email protected]",
   "scripts": {
     "build": "tsc && vite build",
     "build:staging": "tsc && vite build --mode staging",