Update readme training script args and requirements

[s1lent4gnt]

The command pip install rl_zoo3 is not included in the requirements.

Running the training command resulted in an error: rl_zoo3_conf.yaml could not be found because it is located in the examples folder.

When running the gym-lowcostrobot training command, I received an error: unexpected keyword argument 'observation_mode'.
This issue arises from the observation_mode keyword argument in the rl_zoo3_conf.yaml file for the ReachCube-V0 environment.

The argument -orga does not exist in the train script of rl_zoo3.

[perezjln]

Hello @qgallouedec, would you mind having a look, for the orga please.
I suppose it is --orga assuming the correct version of zoo.
@lil-km - Regarding rl_zoo3_conf.yaml , we should maybe put the example/ dir as prefix to prevent confusion.

[qgallouedec]

Thanks @lil-km!

The command pip install rl_zoo3 is not included in the requirements

It's because it's not required for installing this package. rl_zoo3 is only required if you want to train one env with it. You can add pip install rl_zoo3 before the training command though.

I suppose it is --orga assuming the correct version of zoo.

No, orga is for pushing to hub (rl_zoo3.push_to_hub)

So appart from installation instruction, lgtm

[perezjln]

Thanks @qgallouedec ,

No, orga is for pushing to hub (rl_zoo3.push_to_hub)

So it means one should add this extra command into the readme maybe.

[qgallouedec]

Make sure to place the rl-zoo3 installation command in the right section (I can see it hasn't been corrected in this pr)