Changed elasticsearch image url (#4897)

### What problem does this PR solve?

Changed elasticsearch image url to speed up image downloading. 

### Type of change

- [x] Refactoring

docker/docker-compose-base.yml

     container_name: ragflow-es-01
     profiles:
       - elasticsearch
-    image: docker.elastic.co/elasticsearch/elasticsearch:${STACK_VERSION}
+    image: elasticsearch:${STACK_VERSION}
     volumes:
       - esdata01:/usr/share/elasticsearch/data
     ports:

helm/templates/elasticsearch.yaml

         command: ["sysctl", "-w", "vm.max_map_count=262144"]
       containers:
       - name: elasticsearch
-        image: docker.elastic.co/elasticsearch/elasticsearch:{{ .Values.env.STACK_VERSION }}
+        image: elasticsearch:{{ .Values.env.STACK_VERSION }}
         envFrom:
           - secretRef:
               name: {{ include "ragflow.fullname" . }}-env-config