Markdown lint failure on main

The markdown lint workflow failed on `main`.

Workflow run: https://github.com/githubnext/gh-aw-workshop/actions/runs/34315554113

Please fix the markdown linting errors reported in this run.

Start with the linked workflow run and inspect the markdown files and lint errors reported there. Correct the reported Markdown issues, then rerun the markdown lint workflow on the changes; done means the workflow passes without lint errors.

Written by the indexing model from the issue text.