Fixed typo in elasticsearch build image config

.github/workflows/build-elasticsearch.yml

@@ -26,7 +26,7 @@ jobs:
         id: docker_build
         uses: docker/build-push-action@v2
         with:
-          context: images/elasticsearch/7.9
+          context: images/elasticsearch/7.16
           platforms: linux/amd64,linux/arm64
           push: true
           tags: |