Update build.yml

Author: ryuuzaki42

.github/workflows/build.yml

@@ -109,6 +109,9 @@ jobs:
         mv README.md squashfs-root/
         ls -lah squashfs-root/
 
+        # Wrong permissions on AppDir, please set it to 0755 and try again
+        chmod 0755 squashfs-root/
+
         ARCH=x86_64 ./appimagetool-x86_64.AppImage squashfs-root/
         ls -lah