fix(ci): Avoid -- in image tag

Author: hangy

.github/workflows/debian-stable.yml

@@ -356,7 +356,7 @@ jobs:
           notary -d ~/.docker/trust/ -s https://notary.docker.io addhash docker.io/nginxinc/nginx-unprivileged ${{ needs.version.outputs.major }}.${{ needs.version.outputs.minor }}-otel $SIZE --sha256 $DIGEST --publish --verbose
           notary -d ~/.docker/trust/ -s https://notary.docker.io addhash docker.io/nginxinc/nginx-unprivileged ${{ needs.version.outputs.major }}.${{ needs.version.outputs.minor }}-${{ needs.version.outputs.distro }}-otel $SIZE --sha256 $DIGEST --publish --verbose
           notary -d ~/.docker/trust/ -s https://notary.docker.io addhash docker.io/nginxinc/nginx-unprivileged stable-otel $SIZE --sha256 $DIGEST --publish --verbose
-          notary -d ~/.docker/trust/ -s https://notary.docker.io addhash docker.io/nginxinc/nginx-unprivileged stable--${{ needs.version.outputs.distro }}otel $SIZE --sha256 $DIGEST --publish --verbose
+          notary -d ~/.docker/trust/ -s https://notary.docker.io addhash docker.io/nginxinc/nginx-unprivileged stable-${{ needs.version.outputs.distro }}-otel $SIZE --sha256 $DIGEST --publish --verbose
         env:
           DOCKER_CONTENT_TRUST_REPOSITORY_KEY: ${{ secrets.DOCKER_CONTENT_TRUST_REPOSITORY_KEY }}
           DOCKER_CONTENT_TRUST_REPOSITORY_KEY_ID: ${{ secrets.DOCKER_CONTENT_TRUST_REPOSITORY_KEY_ID }}