Enhancement: 20_What_Can_Tina_Do.ipynb

[dotnetdork]

• Added headings to be consistent with the rest of the style changes.
• Emojis were added to keep K-12 students engaged.

https://github.com/dotnetdork/Python-Apprentice/blob/typos/lessons/10_Turtles/20_Introducing_Tina/20_What_Can_Tina_Do.ipynb