docs: Release notes for 0.13.9 (#1623)

docs/release-notes.txt

@@ -11,20 +11,20 @@
 Version 0.13.9
 ==============
 
-**Release Date:** November 19, 2020
+**Release Date:** November 20, 2020
 
 **Improvements**
 
--  Support configuring shmSize for commands (e.g., notebooks, shells,
-   TensorBoards) in :ref:`command configurations
+-  Commands: Support configuring ``shmSize`` for commands (e.g.,
+   notebooks, shells, TensorBoards) in :ref:`command configurations
    <command-notebook-configuration>`.
 
 **Bug Fixes**
 
--  API: Fix a bug that caused the webUI's log viewer to fail to render
-   older pages of trial logs.
+-  API: Fix a bug that caused the WebUI's log viewer to fail to render
+   previous pages of trial logs.
 -  WebUI: Fix a bug in opening TensorBoards from the experiment list
-   page via multiple batch operations.
+   page via batch selection.
 
 Version 0.13.8
 ==============