chore: upgrade mx min version for atlas core

Author: raffiar

packages/modules/atlas-core/package.json

@@ -9,7 +9,7 @@
     "url": "https://github.com/mendix/widgets-resources.git"
   },
   "marketplace": {
-    "minimumMXVersion": "9.12.0.41679",
+    "minimumMXVersion": "9.12.6.53361",
     "marketplaceId": 117187
   },
   "testProject": {