[Bug]: Remove max_tokens settings in HTTP and Python API references

[writinwaters]

Self Checks

• I have searched for existing issues search for existing issues, including closed ones.
• I confirm that I am using English to submit this report (Language Policy).
• Non-english title submitions will be closed directly ( 非英文标题的提交将会被直接关闭 ) (Language Policy).
• Please do not modify this template :) and fill in all the required fields.

RAGFlow workspace code commit ID

N/A

RAGFlow image version

v0.17.2

Other environment information

Actual behavior

N/A

Expected behavior

Max_tokens was removed in version 0.17.2. Please update the API references to reflect this change and verify your implementation accordingly.

Steps to reproduce

N/A

Additional information

No response