x-checker: Use gh to get repos

.github/actions/flatpak-external-data-checker/Dockerfile

@@ -1,7 +1,7 @@
 FROM ghcr.io/flathub/flatpak-external-data-checker:latest
 
 RUN apt-get update && \
-    apt-get install -y parallel && \
+    apt-get install -y gh jq parallel && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 ADD gh-ls-org /usr/local/bin/gh-ls-org

.github/actions/flatpak-external-data-checker/entrypoint.sh

@@ -11,7 +11,7 @@ git config --global user.email "sysadmin@flathub.org"
 mkdir flathub
 cd flathub || exit
 
-gh-ls-org flathub | parallel "git clone --depth 1 {}"
+gh repo list flathub --visibility public -L 8000 --json url --json isArchived --jq '.[] | select(.isArchived == false)|.url' | parallel "git clone --depth 1 {}"
 mapfile -t checker_apps < <( grep -rl -E 'extra-data|x-checker-data|\.AppImage' | cut -d/ -f1 | sort -u | shuf )
 
 for repo in "${checker_apps[@]}"; do