chore(deps): update dependency google-cloud-scheduler to v2.6.0 (#182)

Co-authored-by: Charles Engelke <[email protected]>

Author: renovate-bot

scheduler/snippets/requirements.txt

@@ -1,3 +1,3 @@
 Flask==2.0.2
 gunicorn==20.1.0
-google-cloud-scheduler==2.5.0
+google-cloud-scheduler==2.6.0