Bump pydantic-settings from 2.5.2 to 2.6.1

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.5.2 to 2.6.1.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.5.2...v2.6.1)

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

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

requirements/prod.txt

@@ -1,5 +1,5 @@
 fastapi[all]==0.115.4
-pydantic-settings==2.5.2
+pydantic-settings==2.6.1
 pyjwt[crypto]==2.9.0
 redis[hiredis]==5.2.0
 safe-eth-py==6.0.0b41