ci: Don't use flatpak SDK to get the list of GIR files

Because that gets stuck sometimes, use our own built images instead

Author: bilelmoussaoui

.github/workflows/regenerate_scheduled.yml

@@ -20,12 +20,9 @@ jobs:
         run: |
           sudo apt-get -q update
           sudo apt-get -q upgrade
-          sudo apt-get -q install binutils wget tar xmlstarlet flatpak python3-requests
-          flatpak remote-add --user --if-not-exists gnome-nightly https://nightly.gnome.org/gnome-nightly.flatpakrepo 
-          flatpak install org.gnome.Sdk//master -y --noninteractive
-          flatpak info org.gnome.Sdk//master
-          flatpak run --command=ls org.gnome.Sdk//master /usr/share/gir-1.0/ -lh
-          flatpak run --command=python3 --filesystem=home org.gnome.Sdk//master dl.py
+          sudo apt-get -q install binutils wget tar xmlstarlet podman python3-requests
+          podman pull ghcr.io/gtk-rs/gtk4-rs/gtk4:latest
+          podman run --rm -v ./dl.py:/app/dl.py -w /app ghcr.io/gtk-rs/gtk4-rs/gtk4:latest python3 dl.py
           ./dl-win32.sh
           python3 ./dl-gtk-macos.py
           ./reformat.sh && ./fix.sh