THRIFT-4529: Rust enum variants are now camel-cased

Client: rs
diff --git a/CHANGES b/CHANGES
index 9533ad0..c24c2b2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,7 +1,8 @@
 Apache Thrift Changelog
 
 Breaking Changes since 0.11.0 [for 0.12.0]:
--------------------------------------------------------------------------------- 
+--------------------------------------------------------------------------------
+    * [THRIFT-4529] - Rust enum variants are now camel-cased instead of uppercased to conform to Rust naming conventions
     * [THRIFT-4448] - Support for golang 1.6 and earlier has been dropped.
     * [THRIFT-4474] - PHP now uses the PSR-4 loader by default instead of class maps.
     * [THRIFT-4532] - method signatures changed in the compiler's t_oop_generator.