Add @patrickvonplaten as maintainer of mistral's related files.

[patrickvonplaten]

Thanks a bunch for the collaboration @vllm-team!
As discussed offline, I would like to propose myself as one of the maintainers of mistral's current & future models.

Looking forward to next adventures!

[github-actions]

👋 Hi! Thank you for contributing to the vLLM project.

💬 Join our developer Slack at https://slack.vllm.ai to discuss your PR in #pr-reviews, coordinate on features in #feat- channels, or join special interest groups in #sig- channels.

Just a reminder: PRs would not trigger full CI run by default. Instead, it would only run fastcheck CI which starts running only a small and essential subset of CI tests to quickly catch errors. You can run other CI tests on top of those by going to your fastcheck build on Buildkite UI (linked in the PR checks section) and unblock them. If you do not have permission to unblock, ping simon-mo or khluu to add you in our Buildkite org.

Once the PR is approved and ready to go, your PR reviewer(s) can run CI to test the changes comprehensively before merging.

To run CI, PR reviewers can either: Add ready label to the PR or enable auto-merge.

🚀

[gemini-code-assist]

Code Review

This pull request updates the .github/CODEOWNERS file to include new entries for Mistral-specific files, assigning ownership to @patrickvonplaten. The change is straightforward, but I've identified a minor formatting issue with trailing whitespace on two of the new lines. This could potentially affect how the file is parsed, so I've provided a suggestion to correct it.

[youkaichao]

welcome!