Update field_group - needed for layout builder compatibility

composer.json

@@ -47,7 +47,7 @@
         "drupal/externalauth": "1.1",
         "drupal/features": "3.8",
         "drupal/fences": "2.0-alpha1",
-        "drupal/field_group": "dev-8.x-3.x",
+        "drupal/field_group": "3.0-rc1",
         "drupal/field_validation": "dev-8.x-1.x",
         "drupal/file_mdm": "1.1",
         "drupal/filefield_sources": "dev-8.x-1.x",