Add sync doc notifications.

Signed-off-by: Alicia <115451386+congw729@users.noreply.github.com>

Author: congw729

.github/PULL_REQUEST_TEMPLATE.md

@@ -14,7 +14,7 @@ PLEASE FILL IN THE PR DESCRIPTION HERE ENSURING ALL CHECKLIST ITEMS (AT THE BOTT
 - [ ] The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
 - [ ] The test plan, such as providing test command.
 - [ ] The test results, such as pasting the results comparison before and after, or e2e results
-- [ ] (Optional) The necessary documentation update, such as updating `supported_models.md` and `examples` for a new model.
+- [ ] (Optional) The necessary documentation update, such as updating `supported_models.md` and `examples` for a new model. **Please run `mkdocs serve` to sync the documentation editions to `./docs`.**
 - [ ] (Optional) Release notes update. If your change is user facing, please update the release notes draft.
 </details>