Update django app to be compatible for Django 4.x (#1794)

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Co-authored-by: Ivana Kellyerova <ivana.kellyerova@sentry.io>
Co-authored-by: Anton Pirker <anton.pirker@sentry.io>

tests/integrations/django/myapp/settings.py

@@ -122,7 +122,7 @@ def middleware(request):
     import psycopg2  # noqa
 
     DATABASES["postgres"] = {
-        "ENGINE": "django.db.backends.postgresql_psycopg2",
+        "ENGINE": "django.db.backends.postgresql",
         "NAME": os.environ["SENTRY_PYTHON_TEST_POSTGRES_NAME"],
         "USER": os.environ["SENTRY_PYTHON_TEST_POSTGRES_USER"],
         "PASSWORD": os.environ["SENTRY_PYTHON_TEST_POSTGRES_PASSWORD"],