Release v0.8.0

What's Changed

• Fix doc by @youxingling in #1017
• Support Async RLHF and Agent RLHF by @xiaoxigua999 and @yyht (https://github.com/yyht/openrlhf_async_pipline) in #1015
• Docs & README.md & scritps update @xiaoxigua999

New Contributors

• @youxingling made their first contribution in #1017

Full Changelog: v0.7.5...v0.8.0