Update overdue_projects.sql

HW ...

Q1: What is the scenario where my 'overdue' column is incorrect?
A1: It was marking projects overdue when they were not due and not yet submitted - oops. 

I attempted to fix that, but all I could currently think of (listed above) gives me neither a T or a F in the 'overdue' column for projects that are not due yet nor submitted yet. So that doesn't work.

Q2: Can you add project name, mentor name, student name, assigner name
A2:  Attempted (see above)