Add CHANGELOG entry for 3.1.0

CHANGELOG.rst

@@ -9,6 +9,15 @@ Change Log
 - Format inspired by: `Keep a Changelog <https://keepachangelog.com/en/1.0.0/>`_
 - Versioning scheme follows: `Semantic Versioning <https://semver.org/spec/v2.0.0.html>`_
 
+3.1.0 - 2020-11-09
+==================
+https://www.ohwr.org/project/gn4124-core/tree/v3.1.0
+
+Fixed
+-----
+- hdl: L2P DMA cross page issue
+- hdl: L2P incorrect handling of stall signal
+
 3.0.1 - 2020-09-29
 ==================
 https://www.ohwr.org/project/gn4124-core/tree/v3.0.1
@@ -17,7 +26,7 @@ Fixed
 -----
 - hdl: L2P DMA issues reported with slower hosts
 
-  3.0.0 - 2020-07-27
+3.0.0 - 2020-07-27
 ==================
 https://www.ohwr.org/project/gn4124-core/tree/v3.0.0