.github: fix .desktop file also for aarch64 AppImage build

Signed-off-by: Joachim Wiberg <[email protected]>

Author: troglobit

.github/workflows/build.yml

@@ -45,14 +45,7 @@ jobs:
                   ./appimagetool.AppImage --appimage-extract 2>/dev/null || unsquashfs -d squashfs-root appimagetool.AppImage && \
                   mkdir -p AppDir/usr/bin AppDir/usr/share/applications AppDir/usr/share/icons/hicolor/256x256/apps && \
                   cp demo AppDir/usr/bin/ && \
-                  cat <<EOF > AppDir/usr/share/applications/demo.desktop
-                  [Desktop Entry]
-                  Type=Application
-                  Name=Infix Demo
-                  Exec=usr/bin/demo
-                  Icon=demo
-                  Categories=Game;
-                  EOF
+                  printf '[Desktop Entry]\nType=Application\nName=Infix Demo\nExec=usr/bin/demo\nIcon=demo\nCategories=Game;\n' > AppDir/usr/share/applications/demo.desktop
                   cp jack.png AppDir/usr/share/icons/hicolor/256x256/apps/demo.png && \
                   ln -sf usr/share/applications/demo.desktop AppDir/demo.desktop && \
                   ln -sf usr/share/icons/hicolor/256x256/apps/demo.png AppDir/demo.png && \