Add more schools to schools.csv

[jasoneliu]

Here are some missing schools that Bitcamp has encountered during registration:

• Pratt Institute
• Salisbury University
• Wheaton High School

[erinosher]

Hey there 👋

Thanks for contributing!

We've changed how the schools.csv file is maintained and generated, and are no longer accepting pull requests.

Please check the updated version of the file for your school. If it is still not there, you'll be able to add new schools from within my.mlh.io next week.

Cheers, Erin and the MLH Team