[docs] Fix broken Wuerstchen example links in zh training docs

[richboyneedcash]

What does this PR do?

The Wuerstchen training example was moved from examples/wuerstchen/ to examples/research_projects/wuerstchen/. The Chinese training docs still link to the old main path, so those links 404.

This updates the 5 blob/main / tree/main links across:

• docs/source/zh/training/overview.md
• docs/source/zh/training/lora.md
• docs/source/zh/training/wuerstchen.md

to the current examples/research_projects/wuerstchen/ location. Commit-pinned (SHA) links are intentionally left unchanged, since they correctly reference the file at that historical revision.

All updated targets were verified to exist on main. Docs-only change.

[github-actions]

Hi @richboyneedcash, thanks for the PR! It does not appear to link an issue it fixes. If this PR addresses an existing issue, please add a closing keyword (e.g. Fixes #1234) to the PR description so the issue is linked. See the contribution guide for more details. If this PR intentionally does not fix a tracked issue, a maintainer can add the no-issue-needed label to silence this reminder.

[github-actions]

Hi @richboyneedcash, a follow-up on the reminder above: this PR still does not link an issue it fixes.

Please note that PRs without a linked issue are likely to be automatically closed 10 days after this notice. Adding a closing keyword (e.g. Fixes #1234) to the PR description, or a maintainer adding the no-issue-needed label, will prevent that.

[stevhliu]

thanks for the fix!

[github-actions]

This PR has been automatically closed because it does not link an issue and the reminder above was not addressed within 10 days. If this PR is still relevant, please link the issue it fixes (e.g. Fixes #1234) or ask a maintainer to add the no-issue-needed label, and it can be reopened.

We are experimenting with this process to keep the review queue manageable, and it will sometimes get it wrong. If you think this PR should stay open, please just say so here and we will reopen it — no need to justify it at length.

Thanks again for contributing, and sorry for the noise if we closed this by mistake!

[stevhliu]

hi, would you mind rebasing and then i can merge :)

[github-actions]

This PR has been automatically closed because it does not link an issue and the reminder above was not addressed within 10 days. If this PR is still relevant, please link the issue it fixes (e.g. Fixes #1234) or ask a maintainer to add the no-issue-needed label, and it can be reopened.

We are experimenting with this process to keep the review queue manageable, and it will sometimes get it wrong. If you think this PR should stay open, please just say so here and we will reopen it — no need to justify it at length.

Thanks again for contributing, and sorry for the noise if we closed this by mistake!

[github-actions]

This PR has been automatically closed because it does not link an issue and the reminder above was not addressed within 10 days. If this PR is still relevant, please link the issue it fixes (e.g. Fixes #1234) or ask a maintainer to add the no-issue-needed label, and it can be reopened.

We are experimenting with this process to keep the review queue manageable, and it will sometimes get it wrong. If you think this PR should stay open, please just say so here and we will reopen it — no need to justify it at length.

Thanks again for contributing, and sorry for the noise if we closed this by mistake!