build(deps): bump pydantic from 2.7.0 to 2.7.3

Bumps [pydantic](https://github.com/pydantic/pydantic) from 2.7.0 to 2.7.3.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.7.0...v2.7.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -4,7 +4,7 @@ aiohttp-security==0.5.0
 aiohttp-session[secure]==2.12.0
 aiosqlite==0.20.0
 cryptography==42.0.5
-pydantic==2.7.0
+pydantic==2.7.3
 pytest==8.1.1
 pytest-aiohttp==1.0.5
 pytest-cov==5.0.0