fix(migrations): copilot messed up the migrations-collection

Author: kdinev

projects/igniteui-angular/migrations/migration-collection.json

@@ -246,8 +246,6 @@
             "version": "20.1.0",
             "description": "Updates Ignite UI for Angular from v20.0.6 to v20.1.0",
             "factory": "./update-20_1_0"
-        }
-    }
         },
         "migration-50": {
             "version": "21.0.0",