[RL] Fix GRPO &&RF++ Docs

[greycooker]

Before submitting

• Lint code. If there are lint issues, please format the code first.

# Install and register `pre-commit` in the project folder
pip install pre-commit && pre-commit install

# Process previous code files separately
pre-commit run --file XXXX.py

• Add test cases into tests folder. If there are codecov issues, please add tests cases first.

PR types

Others

PR changes

Docs

Description

更新GRPO&RF++文档

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.66%. Comparing base (edd34aa) to head (a849560).
Report is 1 commits behind head on develop.

❌ Your project status has failed because the head coverage (48.66%) is below the target coverage (58.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #10517   +/-   ##
========================================
  Coverage    48.66%   48.66%           
========================================
  Files          768      768           
  Lines       126955   126955           
========================================
+ Hits         61781    61788    +7     
+ Misses       65174    65167    -7     

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[gongel]

这里把 qwen 的也列出来

[gongel]

缺少 RF++的训练命令