Fix Auth example project link in documentation (keystonejs#8515)

* Update auth.md

Link to Example Project is currently broken 404

* fix example link

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Co-authored-by: Daniel Cousens <413395+dcousens@users.noreply.github.com>

docs/pages/docs/config/auth.md

@@ -459,7 +459,7 @@ The authenticated item will be returned as `item`.
 {% related-content %}
 {% well
 heading="Example Project: Authentication"
-href="<https://github.com/keystonejs/keystone/tree/main/examples/with-auth>" %}
+href="https://github.com/keystonejs/keystone/tree/main/examples/auth" %}
 Adds password-based authentication to the Task Manager starter project.
 {% /well %}
 {% /related-content %}