Add A New Slide

## We Need More Slides
Grab another octocat and create a new slide from scratch.
If you need help, check out the Appendix in the training manual.

Read the Appendix in the training manual first, then inspect the repository for the existing slide structure and conventions. Create one additional slide featuring another octocat, matching the surrounding material; done means the new slide is included and renders consistently with the existing slides.

Written by the indexing model from the issue text.