Add back missing negative

Author: AlanCoding

ansible_base/resource_registry/rest_client.py

@@ -14,7 +14,7 @@
 
 def _check_rbac_installed():
     """Check if ansible_base.rbac is installed and raise RuntimeError if not."""
-    if is_rbac_installed():
+    if not is_rbac_installed():
         raise RuntimeError("This operation requires ansible_base.rbac to be installed")