Add libfuse2 to Linux AppImage build dependencies

linuxdeploy is distributed as an AppImage and may need libfuse2 to
execute even with APPIMAGE_EXTRACT_AND_RUN=1. ubuntu-22.04 runners
don't have it by default.

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

.github/workflows/desktop-release.yml

@@ -267,7 +267,7 @@ jobs:
       - name: Install Linux packaging dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libappindicator3-dev librsvg2-dev patchelf
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libgtk-3-dev libappindicator3-dev librsvg2-dev patchelf libfuse2
 
       - name: Setup Node
         uses: actions/setup-node@v4