chore(deps): update dependency google-cloud-secret-manager to v2.12.6 (#366)

Author: renovate-bot

secretmanager/snippets/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-secret-manager==2.12.5
+google-cloud-secret-manager==2.12.6
 google-crc32c==1.5.0