Update pydantic-settings docs (#8906)

docs/concepts/pydantic_settings.md

@@ -6,4 +6,4 @@ description: Support for loading a settings or config class from environment var
 
 [Pydantic Settings](https://github.com/pydantic/pydantic-settings) provides optional Pydantic features for loading a settings or config class from environment variables or secrets files.
 
-{{ external_markdown('https://raw.githubusercontent.com/pydantic/pydantic-settings/2.1/docs/index.md', '') }}
+{{ external_markdown('https://raw.githubusercontent.com/pydantic/pydantic-settings/2.2/docs/index.md', '') }}