Development has moved to github-stats-extended.

Hi everyone,

maintenance activity in this project has been limited for some time. To keep the project usable and to add new features, active development has moved to [github-stats-extended](https://github.com/stats-organization/github-stats-extended). This extended version of github-readme-stats is being maintained by @marcalexiei and me, with help from the community and from @rickstaa, one of the maintainers of github-readme-stats.

We want to keep this great project alive, but since the current maintainers in the github-readme-stats repository have only limited access rights, adding contributors here and keeping the original Vercel deployment stable has become impossible.

**We encourage everyone to switch to [github-stats-extended](https://github.com/stats-organization/github-stats-extended) for new features, fixes and a stable Vercel deployment.**

To quickly migrate to github-stats-extended, see [here](https://github.com/stats-organization/github-stats-extended#migration-from-github-readme-stats). For a list of new features in github-stats-extended see [here](https://github.com/stats-organization/github-stats-extended/blob/master/docs/fork.md). We also maintain [github-readme-stats-action](https://github.com/stats-organization/github-readme-stats-action), a GitHub Action which creates your stats cards in a GitHub workflow instead of fetching them from a Vercel server.

Finally, we want to thank @anuraghazra and everyone else who worked on github-readme-stats over the years!

This is a maintenance notice rather than a code task; start with the linked github-stats-extended migration guide and docs/fork.md. Done means understanding the migration path and using the maintained repository for future fixes and features.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.