changelog update

Author: AJIXuMuK

CHANGELOG.JSON

@@ -9,7 +9,8 @@
         "enhancements": [
           "`PnP Telemetry` service opt-out support [#475](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/475)",
           "`TaxonomyPicker`: Possibility to hide deprecated and \"Available for Tagging\"= false terms [#421](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/421)",
-          "`FilePicker` - French translation [#449](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/449)"
+          "`FilePicker` - French translation [#449](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/449)",
+          "Slovak localization [#457](https://github.com/SharePoint/sp-dev-fx-controls-react/pull/457)"
           ],
         "fixes": [
           "`RichText`: problem with edit mode [#445](https://github.com/SharePoint/sp-dev-fx-controls-react/issues/445)",