chore: update codeowners (#637)

## Description

See
https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#example-of-a-codeowners-file

`/*` only protects the top level files.

## Related Issue

N/A

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Checklist before merging

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor
Guide](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)
followed

Author: mjnagel

CODEOWNERS

@@ -1 +1,5 @@
-/* @defenseunicorns/uds-core
+* @defenseunicorns/uds-core
+
+# Additional privileged files
+/CODEOWNERS @jeff-mccoy @daveworth
+/LICENSE @jeff-mccoy @daveworth