Update M1 Advent Calendar

[hfaerber]

Activity to be updated: M1 Advent Calendar

Summary of changes needed:

• Minimal changes are likely required here to ensure students are still working on relevant topics.
• At a minimum, all the activities should not include reference to classes or OOP
• Consider if activities around purity would be valuable
• Changes to M2 & M3 will be handled in separate tickets

Note

The repo associated with this issue is front-end-curriculum, however the changes will be required in the repo above. Please be sure to link any PR's in the comments section below.

Lesson creation guidelines (also on FE Hub)

• Lesson Preparation Foundations
• 4 Pillars of Remote Instruction
• Instructional Values
• Culturally Responsive Teaching