docs: add GitHub Actions workshop link to README

Update workshop count from two to three and add direct links to all
workshops including the new GitHub Actions CI/CD workshop.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: GeekTrainer

README.md

@@ -1,6 +1,12 @@
 # Pets workshop
 
-This repository contains the project for two guided workshops to explore various GitHub features. The project is a website for a fictional dog shelter, with a [Flask](https://flask.palletsprojects.com/en/stable/) backend using [SQLAlchemy](https://www.sqlalchemy.org/) and [Astro](https://astro.build/) frontend using [Svelte](https://svelte.dev/) for dynamic pages.
+This repository contains the project for three guided workshops to explore various GitHub features. The project is a website for a fictional dog shelter, with a [Flask](https://flask.palletsprojects.com/en/stable/) backend using [SQLAlchemy](https://www.sqlalchemy.org/) and [Astro](https://astro.build/) frontend using [Svelte](https://svelte.dev/) for dynamic pages.
+
+The available workshops are:
+
+- **[One hour](./content/1-hour/README.md)** — focused on GitHub Copilot
+- **[Full-day](./content/full-day/README.md)** — a full day-in-the-life of a developer using GitHub for their DevOps processes
+- **[GitHub Actions](./content/github-actions/README.md)** — CI/CD pipelines from running tests to deploying to Azure
 
 ## Getting started