adjust composer.json for CakePHP 5.1

Author: LordSimal

composer.json

@@ -4,7 +4,7 @@
     "type": "cakephp-plugin",
     "require": {
         "php": "^8.1",
-        "cakephp/cakephp": "dev-5.next as 5.1.0",
+        "cakephp/cakephp": "^5.1.0",
         "sentry/sentry": "^4.0"
     },
     "require-dev": {