Adds repo migration note

As per CGDS policy (https://www.wrike.com/open.htm?id=887986488), a note is added to readme stating that this repo is now hosted at github. After merging this MR to the master, the repo will be archived as per the policy.

README.md

@@ -2,6 +2,13 @@
 
 🦆🦆 Don't duck that QC thingy 🦆🦆
 
+
+############### **NOTE** ###############
+
+This repo has been archived and is now hosted at https://github.com/uab-cgds-worthey/quac. Please use that site for the most recent changes to the repo.
+
+###################################
+
 ## What is QuaC?
 
 QuaC is a snakemake-based **pipeline** that runs several QC tools for WGS/WES samples and then summarizes their results