resolve #3055 (again) (#3685)

* use new build tool with runtime support instead old build tool for appimage

* Update workflow file to use newer appimagetool

.github/workflows/appimage.yml

@@ -139,7 +139,7 @@ jobs:
           ln -s bin/cryptomator.sh Cryptomator.AppDir/AppRun
       - name: Download AppImageKit
         run: |
-          curl -L https://github.com/AppImage/AppImageKit/releases/download/13/appimagetool-${{ matrix.appimage-suffix }}.AppImage -o appimagetool.AppImage
+          curl -L https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-${{ matrix.appimage-suffix }}.AppImage -o appimagetool.AppImage
           chmod +x appimagetool.AppImage
           ./appimagetool.AppImage --appimage-extract
       - name: Prepare GPG-Agent for signing with key 615D449FE6E6A235
@@ -176,4 +176,4 @@ jobs:
           files: |
             cryptomator-*.AppImage
             cryptomator-*.zsync
-            cryptomator-*.asc
+            cryptomator-*.asc