fix(deps): update dependency @google-cloud/secret-manager to v6 (#877)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

wrongsecrets-balancer/package-lock.json

@@ -12,7 +12,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@google-cloud/iam": "^1.3.0",
-    "@google-cloud/secret-manager": "^5.6.0",
+    "@google-cloud/secret-manager": "^6.0.0",
     "@google-cloud/storage": "^7.14.0",
     "@kubernetes/client-node": "^1.1.2",
     "basic-auth-connect": "^1.1.0",