Don't tag Elastic v7 images with latest

Author: ejsmith

.github/workflows/elasticsearch-docker-7.yml

@@ -46,4 +46,4 @@ jobs:
       working-directory: build/docker/elasticsearch/7.x
       run: |
         VERSION=$(sed -n 's/.*elasticsearch:\([^ ]*\).*/\1/p' Dockerfile)
-        docker buildx build --platform linux/amd64,linux/arm64 --output "type=image,push=true" --file ./Dockerfile . --tag exceptionless/elasticsearch:$VERSION --tag exceptionless/elasticsearch:latest
+        docker buildx build --platform linux/amd64,linux/arm64 --output "type=image,push=true" --file ./Dockerfile . --tag exceptionless/elasticsearch:$VERSION