[doc] Fix link
[doc] Fix link

Change-Id: I788e7f5373af137ed31a8dc45efdd1dde4ac1699
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/recipes-py/+/3388153
Reviewed-by: Quinten Yearsley <747cf52e0cef2e3e9371802a2d344b6c87126a4b@chromium.org>
Auto-Submit: Rob Mohr <d07614a8a0b466db08f68224f87d738b0f9615cf@google.com>
Reviewed-by: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>
Commit-Queue: Rob Mohr <d07614a8a0b466db08f68224f87d738b0f9615cf@google.com>

luci/recipes-py,luci/recipes-py