docs(homepage): add link to new and official workshop (#4292)

Author: dreamorosi

mkdocs.yml

@@ -11,6 +11,7 @@ nav:
       - API reference: api/" target="_blank
       - Upgrade guide: upgrade.md
       - We Made This (Community): we_made_this.md
+      - Workshop 🆕: https://s12d.com/powertools-for-aws-lambda-workshop" target="_blank
       - Roadmap: roadmap.md
       - Features:
           - core/tracer.md