Fix StartupWMClass on Wayland (#4)

Wayland is sensitive to cases in `wmclass`, while X11 is not, so `freetube` works on X11 also.

Author: fiftydinar

make-appimage.sh

@@ -10,6 +10,7 @@ export UPINFO="gh-releases-zsync|${GITHUB_REPOSITORY%/*}|${GITHUB_REPOSITORY#*/}
 export DEPLOY_OPENGL=1
 export DEPLOY_VULKAN=1
 export DEPLOY_PIPEWIRE=1
+export STARTUPWMCLASS=freetube
 
 # Deploy dependencies
 quick-sharun ./AppDir/bin/*