fix: use is None instead of == None in templates.py (PEP 8 E711)

Author: harshadkhetpal

sagemaker-core/src/sagemaker/core/tools/templates.py

@@ -644,7 +644,7 @@ def populate_chained_attributes(resource_name: str, operation_input_args: Union[
 
             if value == Unassigned() :
                 unassigned_args.append(arg)
-            elif value == None or not value:
+            elif value is None or not value:
                 continue
             elif (
                 arg_snake.endswith("name")