fix: install exact prettier dev dependency

CI keeps changing prettier's SCSS formatting. Specify the exact version of prettier that it was first installed with, to maintain a consistent style. Previously, it was only installed as a transitive dependency.

Author: Roardom

bun.lockb

@@ -23,6 +23,7 @@
   },
   "devDependencies": {
     "laravel-vite-plugin": "^1.1.1",
+    "prettier": "3.3.3",
     "prettier-plugin-blade": "2.0.0",
     "pusher-js": "^8.4.0",
     "vite": "^6.0.6",