chore: update workflow

.github/workflows/docker-multiplatform.yml

@@ -18,13 +18,13 @@ jobs:
         id: prep
         run: |
           DOCKER_IMAGE=${{ secrets.DOCKER_USERNAME }}/${GITHUB_REPOSITORY#*/}
-          VERSION=latest
+          VERSION=main
           SHORTREF=${GITHUB_SHA::8}
           # If this is git tag, use the tag name as a docker tag
           if [[ $GITHUB_REF == refs/tags/* ]]; then
             VERSION=${GITHUB_REF#refs/tags/v}
           fi
-          
+
           TAGS="${DOCKER_IMAGE}:${VERSION},${DOCKER_IMAGE}:${SHORTREF}"
           # If the VERSION looks like a version number, assume that
           # this is the most recent version of the image and also