Fix the error link for config

[lihang]

The link to the webpage in config is error,
so redirect them to the correct link.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/695618

[Ghada Khalil (gkhalil)]

low priority / minor - doc cleanup

[OpenStack Infra (hudson-openstack)]

Change abandoned by lihang (<email address hidden>) on branch: master
Review: https://review.opendev.org/695618

[Kristal Dale (kdale)]

Lihang - is this logged bug still relevant? Per the discussion in https://review.opendev.org/695618, it sounds like the reported bug will not be fixed and instead, the directory will be removed in the near future.

Please confirm
1) If any action will be taken to update the config file or
2) If no action will be taken (and what the alternative action will be)

And update the status accordingly.

Thanks!

[M Camp (mcamp859)]

Review was abandoned. (https://review.opendev.org/#/c/695618/)

Confirmed that the path is correct in the current Ironic Contributor guide:
https://docs.openstack.org/ironic/latest/contributor/contributing.html