Fix import (#181)

Author: nfx

src/databricks/labs/ucx/toolkits/group_migration.py

@@ -5,7 +5,7 @@
 from databricks.labs.ucx.config import MigrationConfig
 from databricks.labs.ucx.inventory.inventorizer import Inventorizers
 from databricks.labs.ucx.inventory.permissions import PermissionManager
-from databricks.labs.ucx.inventory.table import PermissionsInventoryTable
+from databricks.labs.ucx.inventory.permissions_inventory import PermissionsInventoryTable
 from databricks.labs.ucx.managers.group import GroupManager