Documentation: Conflicting information when a file matches multiple entry in CODEOWNERS

What does this MR do?

Link the doc and describe what is wrong with it.

https://docs.gitlab.com/ee/user/project/code_owners.html

Conflicting information when a file matches multiple entry:

1. When a file matches multiple entries in the CODEOWNERS file, the users from all entries are displayed on the blob page of the given file.
2. The order in which the paths are defined is significant: the last pattern that matches a given path will be used to find the code owners.

I did a quick test and the second one is correct. Only the last pattern that matches the file will be used to find the cod

Related issues

Closes #205394 (closed)

Author's checklist

• Follow the Documentation Guidelines and Style Guide.
• If applicable, update the permissions table.
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• Apply the documentation label.

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