fix packages using NetBeans hint

assignments/src/MV3500Cohort2021JulySeptember/homework1/LeckieTcpExample2.java

-package pkg3500.leckie;
+package MV3500Cohort2021JulySeptember.homework1;
 
 import java.io.IOException;
 import java.io.OutputStream;

assignments/src/MV3500Cohort2021JulySeptember/homework1/TcpExample2_Leckie_Mod_Hw1.java

-package pkg3500.leckie;
+package MV3500Cohort2021JulySeptember.homework1;
 
 import java.io.IOException;
 import java.io.OutputStream;