doc: Update release and roadmap (#3146)

Author: mwestphal

doc/dev/10-ROADMAPS_AND_RELEASES.md

@@ -4,18 +4,15 @@ F3D is a community driven project and we try to provide as much information as w
 and release expectations. Please keep in mind while we may try to fulfill what was planned, some features may not be available
 as planned and releases can be delayed.
 
-Roadmaps are available on their dedicated issue with their associated project board and milestone.
-The first draft of the roadmap of each release will be discussed publicly on [discord](https://discord.f3d.app), then they are bound to evolve over time
-while the development happens.
+Roadmap for the upcoming work is available in a [dedicated issue](https://github.com/f3d-app/f3d/issues/3108) and loosely mirrored by the [github project](https://github.com/orgs/f3d-app/projects/2).
+This roadmap is discussed publicly on [discord](https://discord.f3d.app) and is bound to evolve over time.
 
-If you want to get involved, please feel free to join the [discord](https://discord.f3d.app), comment on the issues and contribute to the issues that matters to you!
+If you want to get involved, please feel free to join the [discord](https://discord.f3d.app), comment on the issues to get assigned to them and contribute to the issues that matters to you!
 
-## 3.6.0
+## 4.0.0
 
-Out next minor release is planned for July 2026
-
-- [Milestone](https://github.com/f3d-app/f3d/milestone/17)
-- [Board](https://github.com/orgs/f3d-app/projects/2)
+Our next planned release is a major release, 4.0.0 planned for October 2026.
+This [milestone](https://github.com/f3d-app/f3d/milestone/16) contains the work we would like to put into, but things may shift a bit.
 
 ## Release cycle