fix: whitespace

Co-authored-by: Ben Henning <[email protected]>

Author: microbit-matt-hillsdon

src/index.ts

@@ -35,6 +35,7 @@ export class KeyboardNavigation {
    * Focus ring in the workspace.
    */
   private workspaceFocusRing: Element | null = null;
+
   /**
    * Selection ring inside the workspace.
    */