Fix sendgrid -> google. (#15334)

kasteph · web-flow · commit cb9b9b3e3fa4 · 2021-04-12T21:12:30.000+01:00
Fixes minor typo in Airflow documentation. The documentation talks about `sendgrid`, when the section is about Google Cloud Platform's Secrets Manager.
diff --git a/docs/apache-airflow-providers-google/secrets-backends/google-cloud-secret-manager-backend.rst b/docs/apache-airflow-providers-google/secrets-backends/google-cloud-secret-manager-backend.rst
@@ -28,7 +28,7 @@ Before you begin
 
 Before you start, make sure you have performed the following tasks:
 
-1.  Include sendgrid subpackage as part of your Airflow installation
+1.  Include ``google`` subpackage as an extra of your Airflow installation
 
     .. code-block:: bash
 
