DOCSP-13260: [Charts] release notes for 1.20.1 (#436)

Author: steveren

source/customize-charts/field-level-options.txt

@@ -78,6 +78,8 @@ further refine your numeric displays. Once you modify a preset's
 attribute, |charts-short| changes the preset selection in the dropdown
 to :guilabel:`Custom`.
 
+.. _charts-date-format:
+
 Date Format and Time Zone
 -------------------------
 

source/release-notes.txt

@@ -10,12 +10,29 @@ MongoDB Charts Cloud Release Notes
    :depth: 1
    :class: twocols
 
+|charts| v1.20.1
+----------------
+
+*Released November 18, 2020*
+
+Bug fixes in this release:
+
+- Fixes an issue where the :ref:`Convert Time Zone <charts-date-format>`
+  toggle couldn’t be enabled when customizing a field.
+
+- Fixes an issue where charts wouldn’t render if a :ref:`label
+  <field-level-options>` contains a single quote and the chart uses a
+  :ref:`secondary Y axis <secondary-y-axis>`.
+
+- Improves predictability around ordering of :ref:`multiple series
+  <multi-series-charts>` on a chart.
+
 |charts| v1.20.0
 ----------------
 
 *Released November 12, 2020*
 
-Improvements in this Release:
+Improvements in this release:
 
 - Introduces option to show :guilabel:`All others` when
   :ref:`limiting results <charts-limit-data>` on a chart.