docs(config options): update links to Git hosting platform codeowners…

… docs (#29516)

docs/usage/configuration-options.md

@@ -114,7 +114,11 @@ Must be valid usernames on the platform in use.
 
 If enabled Renovate tries to determine PR assignees by matching rules defined in a CODEOWNERS file against the changes in the PR.
 
-See [GitHub](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners) or [GitLab](https://docs.gitlab.com/ee/user/project/code_owners.html) documentation for details on syntax and possible file locations.
+Read the docs for your platform for details on syntax and allowed file locations:
+
+- [GitHub Docs, About code owners](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners)
+- [GitLab, Code Owners](https://docs.gitlab.com/ee/user/project/code_owners.html)
+- [Bitbucket, Set up and use code owners](https://support.atlassian.com/bitbucket-cloud/docs/set-up-and-use-code-owners/)
 
 ## assigneesSampleSize
 
@@ -3775,7 +3779,11 @@ For example: if the username or team name is `bar` then you would set the config
 
 If enabled Renovate tries to determine PR reviewers by matching rules defined in a CODEOWNERS file against the changes in the PR.
 
-See [GitHub](https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners) or [GitLab](https://docs.gitlab.com/ee/user/project/code_owners.html) documentation for details on syntax and possible file locations.
+Read the docs for your platform for details on syntax and allowed file locations:
+
+- [GitHub Docs, About code owners](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners)
+- [GitLab, Code Owners](https://docs.gitlab.com/ee/user/project/code_owners.html)
+- [Bitbucket, Set up and use code owners](https://support.atlassian.com/bitbucket-cloud/docs/set-up-and-use-code-owners/)
 
 ## reviewersSampleSize