Update docker.elastic.co/elasticsearch/elasticsearch Docker tag to v8.19.6

Author: renovate[bot]

.drone.yml

@@ -64,7 +64,7 @@ services:
   - name: redis
     image: redis:8.2.0
   - name: elastic
-    image: docker.elastic.co/elasticsearch/elasticsearch:8.18.2
+    image: docker.elastic.co/elasticsearch/elasticsearch:8.19.6
     environment:
       discovery.type: single-node
       xpack.security.enabled: false