chore(docs): Update error message (#485)

update error message

Author: Harshal6927

advanced_alchemy/types/file_object/registry.py

@@ -64,7 +64,7 @@ def get_backend(self, key: str) -> "StorageBackend":
         try:
             return self._registry[key]
         except KeyError as e:
-            msg = f"No storage backend registered with key {key}"
+            msg = f'No storage backend registered with key "{key}"'
             raise ImproperConfigurationError(msg) from e
 
     @overload

tests/integration/test_file_object.py

@@ -999,7 +999,7 @@ async def test_obstore_backend_storage_registry_management(storage_registry: Sto
 async def test_obstore_backend_storage_registry_error_handling(storage_registry: StorageRegistry) -> None:
     """Test StorageRegistry error handling."""
     # Test get_backend with non-existent key
-    with pytest.raises(ImproperConfigurationError, match="No storage backend registered with key nonexistent"):
+    with pytest.raises(ImproperConfigurationError, match='No storage backend registered with key "nonexistent"'):
         storage_registry.get_backend("nonexistent")
 
     # Test unregister_backend with non-existent key