fix: Fix type of workspace_id in get_region

Signed-off-by: lhhyung <[email protected]>

src/spaceone/inventory_v2/manager/region_manager.py

@@ -39,7 +39,10 @@ def delete_region_by_vo(region_vo: Region) -> None:
         region_vo.delete()
 
     def get_region(
-        self, region_id: str, domain_id: str, workspace_id: Union[str, None] = None
+        self,
+        region_id: str,
+        domain_id: str,
+        workspace_id: Union[list, str, None] = None,
     ) -> Region:
         conditions = {"region_id": region_id, "domain_id": domain_id}