Update CHANGELOG for #1370

Author: thesamet

CHANGELOG.md

@@ -1,12 +1,11 @@
 # Change Log
 
-## [0.11.12](
-
 ## [0.11.11](Unreleased)
 - Add StubFactory for grpc clients (#1351)
 - Support transformation on repeated option scalar (#1355)
 - Exclude preamble from service files. (#1367)
 - Add support for universal traits for sealed oneofs (#1352)
+- Add support for mixing additional traits into sealed oneof companion (#1370)
 
 ## [0.11.10]
 - Fix missing import definitions in services. (#1331)