Update README.md

[mrawdon]

Description

Updated jupyterlab documentation paths, replaced gst with openbb

How has this been tested?

Following updated procedure works, no longer receive error from pip

Checklist:

• Update our Hugo documentation following these guidelines.
• Update our tests following these guidelines.
• Make sure you are following our CONTRIBUTING guidelines.
• If a feature was added make sure to add it to the corresponding scripts file.

Others

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My code passes all the checks pylint, flake8, black, ... To speed up development you should run pre-commit install.
• New and existing unit tests pass locally with my changes. You can test this locally using pytest tests/....

[DidierRLopes]

Ups, my bad! Thanks for catching this @mrawdon 😄