Rename CollectionRewrite to AvailabilityRewrite

Change-Id: If6de4f6bfd8234125f78fc5aedd6746e16be279e
diff --git a/Changes b/Changes
index b2ca454..545f29b 100644
--- a/Changes
+++ b/Changes
@@ -11,6 +11,7 @@
 - Use operation:override in query reference rewrite (#783)
 - Fixed availability regex for all access in the config (important to correctly 
   determine required access of stored VC)
+- Rename CollectionRewrite to AvailabilityRewrite  
   
 
 # version 0.75