Addressed review comments

Author: FastLee

src/databricks/labs/ucx/account/metastores.py

@@ -45,11 +45,11 @@ def assign_metastore(
             else:
                 metastore_id = list(metastore_choices.values())[0]
         self._ac.metastore_assignments.create(workspace_id, metastore_id)
+        logger.info(f"Metastore {metastore_id} assigned to workspace {workspace_id}")
         # set the default catalog using the default_namespace setting API
         if default_catalog is not None:
             self._set_default_catalog(workspace_id, default_catalog)
-        logger.info(f"Metastore {metastore_id} assigned to workspace {workspace_id}")
-        logger.info("Run the 'create-ucx-catalog' command to create the UCX catalog in case it does not exist")
+        logger.info("Run the 'create-ucx-catalog' command to create the UCX catalog for tracking your migration progress")
 
     def _get_region(self, workspace_id: int) -> str | None:
         workspace = self._ac.workspaces.get(workspace_id)