Fixed getting started links

[javiber]

A couple of links in the readme were broken. They were pointing to (what seems like) an old location of the "Getting started" section

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[ianspektor]

Getting started's path was updated in #293, its broken in the README atm because we haven't released yet (so the changes aren't in /stable in the docs). We should either release more often (though the manual part makes that not too desirable), or maybe point the README's links to /latest?

[DonBraulio]

Agree with @ianspektor, it's time to make a new release because the changes in the docs are significant.
I'd keep this PR open until the new version is released, to not forget about it 😄

About changing to /latest... I'm not sure, most people will just do pip install temporian so I think that pointing to stable is the right thing. Although it's a bit annoying that changing the docs in any way requires a new release for the users to actually see it, imo it's a good thing to release more often at this stage of the project.

[javiber]

Agree with you guys, I think it makes sense to just close this one so I will do that.