update flatpak build script

Author: arch

build_flatpak.sh

@@ -2,6 +2,6 @@
 
 sudo sysctl kernel.unprivileged_userns_clone=1
 flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
-flatpak install flathub org.freedesktop.Platform//21.08 org.freedesktop.Sdk//21.08
+# flatpak install flathub org.freedesktop.Platform//21.08 org.freedesktop.Sdk//21.08
 flatpak install org.gnome.Platform//3.38 org.gnome.Sdk//3.38
 flatpak-builder build-dir org.flatpak.PythonFunscriptEditor.json --force-clean