flatpak: use normal flatpak builder

flatpak/make_flatpak.sh.in

@@ -43,7 +43,7 @@ pushd "$private_dir"
 
 flatpak remote-add --if-not-exists --user flathub https://flathub.org/repo/flathub.flatpakrepo
 sed -i 's/FLATPAK_BUILDER_N_JOBS/16/g' "$flatpak_json_filename"
-org.flatpak.Builder --repo=zrythm --force-clean --install-deps-from=flathub --ccache --state-dir="/home/$USER/flatpak-builder-cache" --user build-dir "$flatpak_json_filename"
+flatpak-builder --repo=zrythm --force-clean --install-deps-from=flathub --ccache --state-dir="/home/$USER/flatpak-builder-cache" --user build-dir "$flatpak_json_filename"
 flatpak remote-add --if-not-exists --user zrythm zrythm --no-gpg-verify
 #flatpak install --user zrythm org.zrythm.Zrythm
 flatpak build-bundle zrythm "$out_pkg_filename" org.zrythm.Zrythm