feat(firestore-bigquery-export): bump to node 16

Author: pr-Mais

firestore-bigquery-export/extension.yaml

@@ -56,7 +56,7 @@ resources:
       then exports the changes into BigQuery.
     properties:
       location: ${param:LOCATION}
-      runtime: nodejs14
+      runtime: nodejs16
       eventTrigger:
         eventType: providers/cloud.firestore/eventTypes/document.write
         resource: projects/${param:PROJECT_ID}/databases/(default)/documents/${param:COLLECTION_PATH}/{documentId}