Update changelog

Author: estruyf

CHANGELOG.JSON

@@ -5,6 +5,7 @@
       "changes": {
         "new": [],
         "enhancements": [
+          "`SecurityTrimmedControl`: Added a wrapper `className` property for the parent element [#325](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/325)",
           "`IFrameDialog`: closing dialog on commit [#313](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/313)",
           "`WebPartTitle` add support for section background color [#258](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/258)"
         ],

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Enhancements
 
+- `SecurityTrimmedControl`: Added a wrapper `className` property for the parent element [#325](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/325)
 - `IFrameDialog`: closing dialog on commit [#313](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/313)
 - `WebPartTitle` add support for section background color [#258](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/258)
 

docs/documentation/docs/about/release-notes.md

@@ -4,6 +4,7 @@
 
 ### Enhancements
 
+- `SecurityTrimmedControl`: Added a wrapper `className` property for the parent element [#325](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/325)
 - `IFrameDialog`: closing dialog on commit [#313](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/313)
 - `WebPartTitle` add support for section background color [#258](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/258)