update labels link to correct location in 1.19 docs (go-gitea#25105)

(cherry picked from commit 8df6713)

Author: techknowlogick

docs/content/doc/usage/labels.en-us.md

@@ -25,7 +25,7 @@ For organizations, you can define organization-wide labels that are shared with
 
 Labels have a mandatory name, a mandatory color, an optional description, and must either be exclusive or not (see `Scoped Labels` below).
 
-When you create a repository, you can ensure certain labels exist by using the `Issue Labels` option. This option lists a number of available label sets that are [configured globally on your instance](../customizing-gitea/#labels). Its contained labels will all be created as well while creating the repository.
+When you create a repository, you can ensure certain labels exist by using the `Issue Labels` option. This option lists a number of available label sets that are [configured globally on your instance](./customizing-gitea/#labels). Its contained labels will all be created as well while creating the repository.
 
 ## Scoped Labels