build(deps): update pydantic-settings requirement

Updates the requirements on [pydantic-settings](https://github.com/pydantic/pydantic-settings) to permit the latest version.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.5.0...v2.6.0)

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

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

pyproject.toml

@@ -16,7 +16,7 @@ dependencies = [
     "lxml==5.3.*",
     "redis==5.1.*",
     "pydantic==2.9.*",
-    "pydantic-settings==2.5.*",
+    "pydantic-settings==2.6.*",
 ]
 
 [project.urls]