Added activateEnviroment.sh to readme

[TJ-Solergibert]

Clarification of the activateEnviroment.sh script in the examples working on a cluster with Slurm&Enviroment Modules

What does this PR do?

Clarification of the activateEnviroment.sh script in the examples working on a cluster with Slurm&Enviroment Modules

Fixes #2370

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• Did you make sure to update the documentation with your changes? Here are the
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  here are tips on formatting docstrings.
• Did you write any new necessary tests?

Who can review?

cc @muellerzr

[HuggingFaceDocBuilderDev]

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[muellerzr]

Thanks a bunch for doing this!