fix(deps): update dependency @hello.nrfcloud.com/lambda-helpers to v2.0.68 (#505)

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

Author: renovate[bot]

package.json

@@ -107,7 +107,7 @@
     "@bifravst/random-words": "8.0.2",
     "@bifravst/timestream-helpers": "6.0.3",
     "@hello.nrfcloud.com/certificate-helpers": "1.0.0",
-    "@hello.nrfcloud.com/lambda-helpers": "2.0.67",
+    "@hello.nrfcloud.com/lambda-helpers": "2.0.68",
     "@hello.nrfcloud.com/nrfcloud-api-helpers": "6.0.130",
     "@hello.nrfcloud.com/proto": "15.3.36",
     "@hello.nrfcloud.com/proto-map": "16.1.34",