Adds mention of deprecating fork to release notes.
Adds mention of deprecating fork to release notes.

+review REVIEW-5829

robinverduijn/gradle,gradle/gradle,lsmaira/gradle,gradle/gradle,gstevey/gradle,robinverduijn/gradle,gstevey/gradle,lsmaira/gradle,blindpirate/gradle,lsmaira/gradle,robinverduijn/gradle,gstevey/gradle,blindpirate/gradle,blindpirate/gradle,robinverduijn/gradle,gstevey/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle,lsmaira/gradle,gstevey/gradle,blindpirate/gradle,lsmaira/gradle,gstevey/gradle,robinverduijn/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,lsmaira/gradle,gradle/gradle,blindpirate/gradle,gradle/gradle,blindpirate/gradle,lsmaira/gradle,gradle/gradle,lsmaira/gradle,robinverduijn/gradle,robinverduijn/gradle,gstevey/gradle,blindpirate/gradle,lsmaira/gradle,robinverduijn/gradle,robinverduijn/gradle,gstevey/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle,lsmaira/gradle,gradle/gradle,gstevey/gradle