docc: readme.md

### Describe your issue

Readme should mention the supported versions of task warrior. 2, 3, or both

### Steps to reproduce

No steps as this is a document update

### What was the expected result?

No result other than correct decision making

### Put here any screenshots or videos (optional)

_No response_

### How can we contact you (optional)

_No response_

### Would you like to work on this issue?

None

### By submitting this issue, I have confirmed that:

- [x] I have starred the repo ⭐ and watched 👀 it on GitHub and followed the contribution guidelines.

Comienza con el readme.md del repositorio e identifica la información actual sobre la compatibilidad con Taskwarrior. Confirma si se admite Taskwarrior 2, 3 o ambos, y luego actualiza el README para indicar claramente la compatibilidad; la documentación debe permitir a los usuarios tomar la decisión correcta sobre la versión.

Escrito por el modelo de indexación a partir del texto del issue.