update handbook with upcoming demo day

[demilolu]

Signed-off-by: Demi Ajayi [email protected]`

What did you do?

update handbook with demo day

Why did you do it?

publicity

How have you tested it?

Were docs updated if needed?

• No
• Yes
• N/A

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new console logs
• Fixes entire issue
• Partial fix for issue