DOCSP-30259 v1.39 release notes (#621)

* v1.39 release notes

Author: kyuan-mongodb

source/release-notes.txt

@@ -10,6 +10,31 @@ MongoDB Charts Release Notes
    :depth: 1
    :class: twocols
 
+|charts| v1.39.0
+----------------
+
+*Released August 22th, 2023*
+
+Improvements in this release:
+
+- |charts-short| now supports a new chart type: :ref:`Candlestick Charts
+  <candlestick-chart-ref>`.
+- Dashboard viewers can save a dashboard as a |png|.
+- |charts-short| now supports :ref:`visualizing your Atlas billing data
+  <billing-dashboards>` directly inside the |charts| application.
+- You can programmatically customize your embedded charts using the :ref:`new
+  rendering specifications <rendering-spec-options>`.
+- The |charts-short| timeout limit increased to 10 minutes for
+  experimentation. 
+  
+  .. note::
+     
+     Please contact `MongoDB Support <https://support.mongodb.com/welcome>`__ to set up the timeout limit increase.
+
+Bug fixes in this release:
+
+- Dashboard filters now work correctly when displaying heterogeneous fields.
+
 |charts| v1.38.1
 ----------------