Enhancement: 40_Check_In_Your_Code.ipynb

[dotnetdork]

• Added headings throughout the notebook to break up content and improve readability.
• Changed icons to enhance appearance, style, and clarity (for example, using more visually distinct commit and sync icons).
• Reworded several sentences for better clarity and conciseness.
• Added bullet points to organize steps and instructions.
• Included additional notes, reminders, and tips for users (such as warnings about Codespaces being deleted and advice on saving work).
• Improved formatting with the use of markdown, images, and callouts for important actions and troubleshooting steps.

https://github.com/dotnetdork/Python-Apprentice/blob/master/lessons/10_Turtles/20_Introducing_Tina/40_Check_In_Your_Code.ipynb