Added a note about deadline for GHOP Task

GHOPUserManual.wiki

diff --git a/GHOPUserManual.wiki b/GHOPUserManual.wiki
index 466ab94..08a28d0 100644
--- a/GHOPUserManual.wiki
+++ b/GHOPUserManual.wiki
@@ -43,6 +43,8 @@
 
   A Mentor is one who mentors one or more student for accomplishing GHOP Tasks.
 
+  * Suggest a new task/Edit the task: The deadline for the task cannot exceed 30 days i.e in terms of hours it cannot exceed 720 hours.
+
 == Student ==
 
   A student is one who can claim a task, work on it, submit his work and win prizes.