Add --verbose to Linux AppImage build for debugging

Need to see the actual linuxdeploy error output instead of the opaque
"failed to run linuxdeploy" message.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/desktop-release.yml

@@ -332,7 +332,7 @@ jobs:
           releaseBody: See the assets to download and install this version.
           releaseDraft: ${{ env.RELEASE_DRAFT }}
           prerelease: false
-          args: --bundles appimage
+          args: --bundles appimage --verbose
 
       - name: Build Linux app (smoke only)
         if: env.IS_SMOKE_TAG == 'true'