Update opencti/worker Docker tag to v6.9.4

Author: renovate[bot]

docker-compose.opensearch.yml

@@ -167,7 +167,7 @@ services:
       timeout: 5s
       retries: 20
   worker:
-    image: opencti/worker:6.9.0
+    image: opencti/worker:6.9.4
     environment:
       - OPENCTI_URL=http://opencti:8080
       - OPENCTI_TOKEN=${OPENCTI_ADMIN_TOKEN}