chore(deps): update dependency google-cloud-functions to v1.18.1 (#12891)

Author: renovate-bot

functions/v2/deploy-function/requirements.txt

@@ -1,3 +1,3 @@
 google-auth==2.19.1
-google-cloud-functions==1.16.3
+google-cloud-functions==1.18.1
 google-cloud-storage==2.9.0