Update dependency laravel/framework to v12

Author: renovate[bot]

backend/composer.json

@@ -15,7 +15,7 @@
 		"google/apiclient": "2.18.2",
 		"guzzlehttp/guzzle": "7.9.2",
 		"johngrogg/ics-parser": "3.4.1",
-		"laravel/framework": "^11.0",
+		"laravel/framework": "^12.0",
 		"laravel/sanctum": "^4.0",
 		"laravel/tinker": "^2.9",
 		"mongodb/laravel-mongodb": "^5.0",