Fix check for multiple ceph-mgr per node

Signed-off-by: Tobias Wolf <[email protected]>

src/rookify/modules/create_rook_cluster/main.py

@@ -45,7 +45,7 @@ def preflight(self) -> None:
             mgr_count = 0
 
             for node, mgrs in node_ls_data["mgr"].items():
-                if len(mons) > 1:
+                if len(mgrs) > 1:
                     raise ModuleException(
                         f"There are more than 1 mgr running on node {node}"
                     )