Fix workflow

Author: dalance

.github/workflows/release.yml

@@ -90,7 +90,7 @@ jobs:
         token: ${{ secrets.VERYL_DOCKER_PAT }}
         repository: veryl-lang/docker
         event-type: release
-        client-payload: '{"ref": "${{ github.ref }}"}'
+        client-payload: '{"ref": "${{ github.ref_name }}"}'
 
   highlightjs:
     permissions: