Update Roadmap in docs (likely in the state of pre-2.0)

[ibes]

Tempest version

3.0

PHP version

8.5

Operating system

Other

Description

As this file reference an upcoming version 2.0 but Tempest is currently 3.x I imagine it is not up to date anymore:
https://github.com/tempestphp/tempest-framework/blob/3.x/docs/5-extra-topics/00-roadmap.md

Unfortunately I am too new in the project to know what's the current state so I cannot start a pull request.

[brendt]

Thanks for reporting! Fixed with #2136