package is not auto-updated after moving it on github

I have the problem that I moved a package on github from https://github.com/georgringer/news_subheadline to https://github.com/ext-news/news_subheadline and updated the URL at packagist but it still says that it is not auto-updated.

Is there any issue on my side? I also updated the hook at github several times, using still as username georgringer and my token.

Thanks for help