DOC: ChatBedrockConverse Anthropic-specific API parameters

[thomasuebi]

Checklist

• I added a very descriptive title to this issue.
• I included a link to the documentation page I am referring to (if applicable).

Issue with current documentation:

https://js.langchain.com/docs/integrations/chat/bedrock_converse/
https://v03.api.js.langchain.com/classes/_langchain_aws.ChatBedrockConverse.html?_gl=1*1q4mddn*_ga*MTAzNTE4ODI3MC4xNzQyNjI5MDI1*_ga_47WX3HKKY2*czE3NDc3Mzc0NjMkbzEwJGcwJHQxNzQ3NzM3NDcxJGowJGwwJGgw

Idea or request for content:

The Anthropic API provides parameters such as

thinking: {
type: 'enabled',
budget_tokens: 32000,
},

It seems as if LangChain's ChatBedrockConverse does not expose such options - is this a Bedrock limitation or missing functionality in LangChain?