chore: add --clobber to gh release upload for .sig files (#106)

Signed-off-by: Claude <noreply@anthropic.com>
Co-authored-by: Claude <noreply@anthropic.com>

Author: its-mash

.github/workflows/release.yml

@@ -214,7 +214,7 @@ jobs:
 
           # Upload all .sig files to the release
           if ls sigs/*.sig &>/dev/null; then
-            gh release upload "$TAG" sigs/*.sig --repo "$REPO"
+            gh release upload "$TAG" sigs/*.sig --repo "$REPO" --clobber
           fi
 
       - name: Publish release