[llvm] [Policy] Replace "code owners" with "maintainers" (PR #107384)

[Nikita Popov via llvm-commits]

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@@ -328,17 +328,17 @@ Release Patch Rules
 Below are the rules regarding patching the release branch:
 
 #. Patches applied to the release branch may only be applied by the release
-   manager, the official release testers or the code owners with approval from
+   manager, the official release testers or the maintainers with approval from
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nikic wrote:

Unrelated side note: I think that nowadays only release managers can merge to release branches.

https://github.com/llvm/llvm-project/pull/107384