[BUG] sota-implementation requires nightly built

[jimdor]

Describe the bug

dqn_cartpole from sota-implementations/dqn doesn't working. Crashes with: ImportError: cannot import name 'Composite' from 'torchrl.data'

To Reproduce

Just run dqn_cartpole.py, it will call ulits_cartpole.py and then it will crash with ImportError

System info

Describe the characteristic of your environment:

• The library was installed using pip
• Python version = 3.9.19

Reason and Possible fixes

After some time i think rename Composite -> CompositeSpec in importing and in it's only one will fix this issue

Checklist

• I have checked that there is no similar issue in the repo (required)
• I have read the documentation (required)
• I have provided a minimal working example to reproduce the bug (required)

[vmoens]

This is due to a change in the specs names, try from v0.4.0

https://github.com/pytorch/rl/tree/v0.4.0