Update _handleCheckboxTap

lib/src/widgets/raw_editor.dart

@@ -407,6 +407,8 @@ class RawEditorState extends EditorState
       _disableScrollControllerAnimateOnce = true;
       final attribute = value ? Attribute.checked : Attribute.unchecked;
 
+      widget.controller.formatText(offset, 0, attribute);
+
       // Checkbox tapping causes controller.selection to go to offset 0
       // Stop toggling those two toolbar buttons
       widget.controller.toolbarButtonToggler = {
@@ -414,8 +416,6 @@ class RawEditorState extends EditorState
         Attribute.header.key: Attribute.header
       };
 
-      widget.controller.formatText(offset, 0, attribute);
-
       // Go back from offset 0 to current selection
       SchedulerBinding.instance!.addPostFrameCallback((_) {
         widget.controller.updateSelection(