Correct spelling mistake in ICLA

preferrably should be preferably

Author: hazendaz

ICLA

@@ -12,7 +12,7 @@ well as the protection of the Project and its users; it does not
 change your rights to use your own Contributions for any other purpose.
 If you have not already done so, please complete and sign, then scan
 and email a PDF file of this Agreement to an existing member of the 
-Project (preferrably the person who invited you)for filing. Please 
+Project (preferably the person who invited you)for filing. Please 
 read this document carefully before signing and keep a copy for your 
 records.