Fix push description to quay.io

Author: trnubo

.github/workflows/update-registry-metadata.yml

@@ -69,8 +69,9 @@ jobs:
 
       - name: Update Quay.io Repository Description
         run: |
+          JSON_DESCRIPTION="$(jq -n --arg desc "$(<README.md)" '{description: $desc}')"
           curl -sSf -X PUT \
             -H "Authorization: Bearer ${{ secrets.PANUBUILD_QUAYIO_API_TOKEN }}" \
             -H "Content-Type: application/json" \
-            -d "{\"description\": \"$(cat README.md)\"}" \
+            -d "${JSON_DESCRIPTION}" \
             'https://quay.io/api/v1/repository/${{ steps.image_name.outputs.image_name }}'