update release_note.md

Author: oaksharks

docs/source/release_note.md

@@ -8,7 +8,7 @@ Version 0.2.5(stable)
 
 
 Version 0.2.3.1(stable)
-=====================
+=======================
 **Main improvements**
 
 1. Support `hypernets==0.2.5.1`
@@ -18,5 +18,5 @@ Version 0.2.3
 =====================
 **Main improvements**
 
-1. Introducing Hypernets `CompeteExperiment`, supports a series of advanced features based on it, please refer to `CompeteExperiment` in hypernets for further information
-
+1. Introducing [Hypernets](https://github.com/DataCanvasIO/Hypernets) `CompeteExperiment`, supports a series of advanced features based on it, please refer to `CompeteExperiment` in hypernets for further information
+2. Support [Dask](https://www.dask.org/) distributed training