Update branch alias for dev-2.x to 2.4.x-dev

Author: herbertroth

composer.json

@@ -52,7 +52,7 @@
   },
   "extra": {
     "branch-alias": {
-      "dev-2.x": "2.3.x-dev"
+      "dev-2.x": "2.4.x-dev"
     },
     "pimcore": {
       "bundles": [