Rename flatpak application id

Author: agorgl

flatpak/audio.mod.mod-desktop.yaml renamed to flatpak/audio.mod.mod_desktop.yaml

@@ -1,4 +1,4 @@
-id: audio.mod.mod-desktop
+id: audio.mod.mod_desktop
 runtime: org.kde.Platform
 runtime-version: "5.15-23.08"
 sdk: org.kde.Sdk