disable signing for now, until it gets fixed upstream

.github/workflows/docker-publish.yml

@@ -109,13 +109,13 @@ jobs:
       # repository is public to avoid leaking data.  If you would like to publish
       # transparency data even for private images, pass --force to cosign below.
       # https://github.com/sigstore/cosign
-      - name: Sign the published Docker image
-        if: ${{ github.event_name != 'pull_request' }}
-        env:
-          COSIGN_EXPERIMENTAL: "true"
-        # This step uses the identity token to provision an ephemeral certificate
-        # against the sigstore community Fulcio instance.
-        run: echo "${{ steps.meta.outputs.tags }}" | xargs -I {} cosign sign {}@${{ steps.build-and-push.outputs.digest }}
+#       - name: Sign the published Docker image
+#         if: ${{ github.event_name != 'pull_request' }}
+#         env:
+#           COSIGN_EXPERIMENTAL: "true"
+#         # This step uses the identity token to provision an ephemeral certificate
+#         # against the sigstore community Fulcio instance.
+#         run: echo "${{ steps.meta.outputs.tags }}" | xargs -I {} cosign sign {}@${{ steps.build-and-push.outputs.digest }}
 
       # Temp fix
       # https://github.com/docker/build-push-action/issues/252