Update ReleaseNotes.md

Author: alastairtree

ReleaseNotes.md

@@ -2,6 +2,7 @@
 
 ## Version 2.1.3
 - Rename ExpirationMode.ImmediateExpiry => ExpirationMode.ImmediateEviction
+- Lovely new logo! (#133) Thanks to @doolali
 
 ## Version 2.1.2
 - Tweak key lock array size based on CPU count so larger for bigger machines (See PR #126 and discussion with @jjxtra)
@@ -74,4 +75,4 @@
 
 - Initial release of CachingService and interface IAppCache. 
 - Readme
-- Core unit tests.
+- Core unit tests.