Lesson Plan Template Needs Updating

[JulieKuehl]

The lesson plan doesn't quite follow the current lesson plan template that the team uses. Please update it to match the outline found at https://github.com/wptrainingteam/repo-template

[megane9988]

yes i do

[megane9988]

I think this issue solved by these pull requests.

https://github.com/wptrainingteam/introduction-to-css/pull/22/files
https://github.com/wptrainingteam/introduction-to-css/pull/21/files

@JulieKuehl