fix(deps): update dependency pydantic to v2.7.3

This MR contains the following updates:

Package	Type	Update	Change
pydantic (changelog)	dependencies	patch	2.7.2 -> 2.7.3

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Release Notes

pydantic/pydantic (pydantic)

v2.7.3

Compare Source

GitHub release

What's Changed

Packaging

• Bump pydantic-core to v2.18.4 by @​sydney-runkle in #​9550

Fixes

• Fix u style unicode strings in python @​samuelcolvin in pydantic/jiter#110

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