fix

Author: atsju

.github/workflows/build-windows.yml

@@ -389,7 +389,7 @@ jobs:
       - name: Get short SHA
         id: short_sha
         shell: bash
-        run: echo "short_sha=${github.event.pull_request.head.sha::7}" >> $GITHUB_OUTPUT
+        run: echo "short_sha=${{github.event.pull_request.head.sha::7}}" >> $GITHUB_OUTPUT
 
       - name: Comment PR with artifact link
         if: github.event_name == 'pull_request'