Typo in Google Cloud Storage sensor: airflow/providers/google/cloud/sensors/gcs/GCSObjectsWithPrefixExistenceSensor

The word _With_ is spelled incorrectly. It should be: GCSObjects**With**PrefixExistenceSensor

**Apache Airflow version**: 2.0.0
**Environment**:
- **Cloud provider or hardware configuration**: Google Cloud
- **OS** (e.g. from /etc/os-release): Mac OS BigSur






tests/always/test_project_structure.py
missing_operators = []
        for resource_type in ["operators", "sensors", "transfers"]:
            operator_files = set(
                self.find_resource_files(top_level_directory="airflow", resource_type=resource_type)
            )
            for filepath in operator_files:
                service_name = os.path.basename(filepath)[: -(len(".py"))]
                example_dags = list(
                    glob.glob(
                        f"{ROOT_FOLDER}/airflow/providers/google/*/example_dags/example_{service_name}*.py"
                    )
                )
                if not example_dags:
                    
                    continue
                example_paths = {
                    path for example_dag in example_dags for path in get_imports_from_file(example_dag)
                }
                example_paths = {
                    path for path in example_paths if f'.{resource_type}.{service_name}.' in path
                }
                print("example_paths=", example_paths)
                operators_paths = set(get_classes_from_file(f"{ROOT_FOLDER}/{filepath}"))
                missing_operators.extend(operators_paths - example_paths)
        assert set(missing_operators) == self.MISSING_EXAMPLES_FOR_OPERATORS
    @parameterized.expand(
        itertools.product(["_system.py", "_system_helper.py"], ["operators", "sensors", "transfers"])
    )
    def test_detect_invalid_system_tests(self, resource_type, filename_suffix):