Add @dgp10801 as a CODEOWNER (#96)

Author: Prekshith-Microsoft

.github/CODEOWNERS

@@ -2,4 +2,4 @@
 # Each line is a file pattern followed by one or more owners.
 
 # These owners will be the default owners for everything in the repo.
-* @Avijit-Microsoft @Roopan-Microsoft @Prajwal-Microsoft @Vinay-Microsoft @aniaroramsft @toherman-msft @nchandhi
+* @Avijit-Microsoft @Roopan-Microsoft @Prajwal-Microsoft @Vinay-Microsoft @aniaroramsft @toherman-msft @nchandhi @dgp10801