standardize chart widths on chart type page

Author: jeff-allen-mongo

source/chart-types.txt

@@ -111,7 +111,7 @@ specifies the query response limit for that particular chart type.
 .. include:: /includes/donut-blurb.rst
 
 .. figure:: /images/charts/donut-simple-example.png
-   :figwidth: 600px
+   :figwidth: 525px
    :alt: Donut Chart Example
 
 :ref:`Gauge Charts <gauge-chart-ref>`
@@ -120,7 +120,7 @@ specifies the query response limit for that particular chart type.
 .. include:: /includes/gauge-blurb.rst
 
 .. figure:: /images/charts/gauge-chart.png
-   :figwidth: 750px
+   :figwidth: 525px
    :alt: Gauge Chart Example
 
 .. class:: hidden