[TO REVIEW] Update CONTRIBUTING.md

[ambroiseodt]

Update the dependency installation in CONTRIBUTING.md to solve the import problem for users using .venv virtual env and not conda virtual envs.

Update: the problem was coming from using zsh or bash terminal and not on the kind of virtual env used

[antoinecollas]

Is it related to venv vs conda or is it because of your terminal?
In some terminals, you need to escape brackets: pip install -e .\[dependance\]

[ambroiseodt]

@antoinecollas good question, it needs to be tested (here the error was triggered with zsh while it worked for a bash terminal). What do you suggest as a global solution?

[antoinecollas]

I can merge it as it is. It was more about understanding where the problem comes from. And I think it comes from zsh.

[ambroiseodt]

After some tests, I confirm that it comes from zsh. Adding the quotes works fine for any terminal so I think you can merge. Thanks