Update pydantic requirement from <2.6.0,>=2.1.1 to >=2.1.1,<2.7.0

Updates the requirements on [pydantic](https://github.com/pydantic/pydantic) to permit the latest version.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v2.1.1...v2.6.0)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
...

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

requirements.txt

@@ -1 +1 @@
-pydantic>=2.1.1,<2.6.0
+pydantic>=2.1.1,<2.7.0