Show the link to the All Hands product roadmap (#5192)

Co-authored-by: Graham Neubig <neubig@gmail.com>

README.md

@@ -90,6 +90,8 @@ See more about the community in [COMMUNITY.md](./COMMUNITY.md) or find details o
 
 ## 📈 Progress
 
+See the monthly OpenHands roadmap [here](https://github.com/orgs/All-Hands-AI/projects/1) (updated at the maintainer's meeting at the end of each month).
+
 <p align="center">
   <a href="https://star-history.com/#All-Hands-AI/OpenHands&Date">
     <img src="https://api.star-history.com/svg?repos=All-Hands-AI/OpenHands&type=Date" width="500" alt="Star History Chart">