pin pydantic version for iceberg tests

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📝 Summary

There is an upstream issue with pyiceberg and pydantic causing failing tests, we can pin pydantic until upstream is fixed.
apache/iceberg-python#2590

🔍 Description of Changes

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

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Project	Deployment	Preview	Comments	Updated (UTC)
marimo-docs	Error			Oct 9, 2025 0:50am

[dmadisetti]

Folded this into #6725 since we missed the lock file:

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thanks @dmadisetti , I wasn't sure which command to run to update the lock file, which one did you run? (we could add to docs too)