fix(ci): Remove slashes in docker references

.github/workflows/release-ghcr.yml

@@ -46,7 +46,7 @@ jobs:
           # Downcase the package repository, because docker reference
           # are required to be lower case
           REPO_OWNER="$(echo ${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]')"
-          IMAGE_TAG="$GITHUB_REF_NAME"
+          IMAGE_TAG="$(echo $GITHUB_REF_NAME | tr '/' '_')"
 
           echo "REPO_OWNER=${REPO_OWNER}" >> "$GITHUB_ENV"
           echo "IMAGE_TAG=${IMAGE_TAG}" >> "$GITHUB_ENV"