Update README.md

hw5/README.md

 # Out-of-Core Group By Aggregate
 # Out-of-Core Group By Aggregate
 
 
-*Due 6/5/19 11:59 PM*
+*Graduating Seniors: Due 6/5/20 11:59 PM*
+*Everyone else: Due 6/8/20 11:59 PM*
 
 
 In this assignment, you will implement an out-of-core
 In this assignment, you will implement an out-of-core
 version of the group by aggregate (aggregation by key)
 version of the group by aggregate (aggregation by key)