Update docker.elastic.co/elasticsearch/elasticsearch Docker tag to v9

Author: renovate[bot]

.drone.yml

@@ -59,7 +59,7 @@ services:
   - name: redis
     image: redis:7.4.4
   - name: elastic
-    image: docker.elastic.co/elasticsearch/elasticsearch:8.18.2
+    image: docker.elastic.co/elasticsearch/elasticsearch:9.0.3
     environment:
       discovery.type: single-node
       xpack.security.enabled: false