chore(deps): update dependency django-storages to v1.13 (GoogleCloudPlatform#8239)

Co-authored-by: Leah E. Cole <[email protected]>

Author: renovate-bot

appengine/flexible/django_cloudsql/requirements.txt

@@ -4,4 +4,4 @@ gunicorn==20.1.0
 psycopg2-binary==2.9.3
 django-environ==0.9.0
 google-cloud-secret-manager==2.12.0
-django-storages[google]==1.12.3
+django-storages[google]==1.13

run/django/requirements.txt

@@ -1,6 +1,6 @@
 Django==4.0.4; python_version >= '3.8'
 Django==3.2.14; python_version < '3.8'
-django-storages[google]==1.12.3
+django-storages[google]==1.13
 django-environ==0.9.0
 psycopg2-binary==2.9.3
 gunicorn==20.1.0