[BugFix] Update pydantic to fix error on python 3.10

[ProExpertProg]

Update pydantic to fix error on python 3.10.

FIX issue from #17599.

[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.

🚀

[hmellor]

LGTM

Not sure if the pip-compile pre-commit hook will complain about this not being updated in requirements/test.txt

[ProExpertProg]

Yeah I saw that - it seems like 2.9 is pulled in via other packages, should we make it explicitly 2.10 in test.in?

[hmellor]

It's not causing a problem so it'd technically be fine to leave it. But we might want to set a lower bound there as well for consistency.

[DarkLight1337]

The quantization test is still failing

[DarkLight1337]

Closing this in favor of #18843

[DarkLight1337]

Sorry I missed the context of this PR! Can you merge from main to fix the CI failures?

[DarkLight1337]

Actually let me just force-merge this