update changelog

Author: joaojmendes

CHANGELOG.json

@@ -19,7 +19,8 @@
           "Update the SPFx source project to add an extension + form customizer [#1410](https://github.com/pnp/sp-dev-fx-controls-react/issues/1410)",
           "`AdaptiveCardDesignerHost`: Add Sample Data to Adaptive Card Editor [#1425](https://github.com/pnp/sp-dev-fx-controls-react/pull/1425)",
           "`AdaptiveCardHost`: Logic to prevent re-renders (flicker) [#1425](https://github.com/pnp/sp-dev-fx-controls-react/pull/1425)",
-          "`ListItemComments`: Add new parameter for ListItemComments to highlight comment [#1430](https://github.com/pnp/sp-dev-fx-controls-react/pull/1430)"
+          "`ListItemComments`: Add new parameter for ListItemComments to highlight comment [#1430](https://github.com/pnp/sp-dev-fx-controls-react/pull/1430)",
+          "`DynamicForm`: Initialize changedValue with defaultValue [#1454](https://github.com/pnp/sp-dev-fx-controls-react/pull/1454)"
         ],
         "fixes": [
           "`DateTimePicker`: broken link for `getErrorMessage` property fixed [#1277](https://github.com/pnp/sp-dev-fx-controls-react/pull/1381)",
@@ -43,7 +44,8 @@
         "[mgitta](https://github.com/mgitta)",
         "[Michaël Maillot](https://github.com/michaelmaillot)",
         "[mikezimm](https://github.com/mikezimm)",
-        "[wuxiaojun514](https://github.com/wuxiaojun514)"
+        "[wuxiaojun514](https://github.com/wuxiaojun514)",
+        "[Samuele Furnari](https://github.com/SamueleFurnari)"
       ]
     },
     {