fix(deps): update dependency @hello.nrfcloud.com/lambda-helpers to v1.2.18

Author: renovate[bot]

package-lock.json

@@ -100,7 +100,7 @@
     "@aws-sdk/client-ssm": "3.600.0",
     "@aws-sdk/util-dynamodb": "3.602.0",
     "@hello.nrfcloud.com/certificate-helpers": "1.0.0",
-    "@hello.nrfcloud.com/lambda-helpers": "1.2.17",
+    "@hello.nrfcloud.com/lambda-helpers": "1.2.18",
     "@hello.nrfcloud.com/nrfcloud-api-helpers": "5.2.19",
     "@hello.nrfcloud.com/proto": "14.1.2",
     "@hello.nrfcloud.com/proto-map": "13.1.1",