Readme updates and renamed GenAIStudio tutorial

[zbyosufzai]

Pull Request Template

Description

Edited the README to add a direct link to Gen AI tutorials also listed what tutorials we had and made them direct links. Fixed spelling mistakes on README and renamed Gen AI Studio tutorial because its been renamed Vertex AI Studio

Assignee

Assignees: @kyleoconnell-NIH

PR checklist

Please ensure the following:

• [X] This comment contains a description of changes (with reason).
• [X] All changes were tested.
• [ ] If you've fixed a bug mention the issue number/name.
• [ X] Apply approriate tags (e.g. documentation, bug)