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
with open(filename, 'rb', 0) as file, mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ) as content:
            if content.find(bytes(pattern, 'utf-8')) == -1:
                self.fail(f"File {filename} contains illegal pattern - {pattern}")
    def test_providers_modules_should_have_tests(self):
        """
        Assert every module in /airflow/providers has a corresponding test_ file in tests/airflow/providers.
        """
        
        expected_missing_providers_modules = {
            (
                'airflow/providers/amazon/aws/hooks/aws_dynamodb.py',
                'tests/providers/amazon/aws/hooks/test_aws_dynamodb.py',
            )
        }
        
        modules_files = glob.glob(f"{ROOT_FOLDER}/airflow/providers/**/*.py", recursive=True)
        
        modules_files = (os.path.relpath(f, ROOT_FOLDER) for f in modules_files)
        
        modules_files = (f for f in modules_files if "/example_dags/" not in f)
        
        modules_files = (f for f in modules_files if not f.endswith("__init__.py"))
        
        expected_test_files = (
            f'tests/{f.partition("/")[2]}' for f in modules_files if not f.endswith("__init__.py")
        )