minty: Add neon speed up to change log

Change-Id: Idad3372e0af640cfddf8d04af0bf76bded1edf5e

CHANGELOG

diff --git a/CHANGELOG b/CHANGELOG
index 8011877..135b395 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -18,7 +18,8 @@
       * Quality improvements for screen content with active maps
 
   - Speedup
-    * Neon optimizations speed up
+    * Added and improved Neon SIMD paths for dynamic frame scaling with ~1.5%
+      overall encoding speedup.
 
   - Other Improvements
     * Binary size reduction: 10% compared with last release, with