**Apache Airflow version**: latest (main branch)

**What happened**:

There is a little typo in this line of code: https://github.com/apache/airflow/blob/6172b0e6c796d1d757ac1806b671ee168c031b1e/airflow/contrib/operators/gcs_to_bq.py#L40

**What you expected to happen**:

It should be *gcs_to_bigquery* instead of *gcs_to_bq*:

```
Please use `airflow.providers.google.cloud.transfers.gcs_to_bigquery.GCSToBigQueryOperator`.""",
```

tests/providers/google/cloud/transfers/test_gcs_to_bigquery.py
#
#
#
import unittest
from unittest import mock
from airflow.providers.google.cloud.transfers.gcs_to_bigquery import GCSToBigQueryOperator
TASK_ID = 'test-gcs-to-bq-operator'
TEST_EXPLICIT_DEST = 'test-project.dataset.table'
TEST_BUCKET = 'test-bucket'
MAX_ID_KEY = 'id'
TEST_SOURCE_OBJECTS = ['test/objects/*']
TEST_SOURCE_OBJECTS_AS_STRING = 'test/objects/*'
LABELS = {'k1': 'v1'}
DESCRIPTION = "Test Description"
class TestGoogleCloudStorageToBigQueryOperator(unittest.TestCase):
    @mock.patch('airflow.providers.google.cloud.transfers.gcs_to_bigquery.BigQueryHook')
    def test_execute_explicit_project_legacy(self, bq_hook):