chore: bump pydantic from 2.6.3 to 2.6.4

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.6.3 to 2.6.4.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.6.3...v2.6.4)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -86,7 +86,7 @@ pyasn1-modules==0.3.0
     # via google-auth
 pycparser==2.21
     # via cffi
-pydantic==2.6.3
+pydantic==2.6.4
     # via
     #   -r requirements.in
     #   pytest-interface-tester