fix: private menu manager

Signed-off-by: Akos Kitta <[email protected]>

Author: Akos Kitta

Diff for: arduino-ide-extension/src/browser/contributions/examples.ts

@@ -36,7 +36,7 @@ export abstract class Examples extends SketchContribution {
   private readonly commandRegistry: CommandRegistry;
 
   @inject(MenuModelRegistry)
-  protected readonly menuRegistry: MenuModelRegistry;
+  private readonly menuRegistry: MenuModelRegistry;
 
   @inject(ExamplesService)
   protected readonly examplesService: ExamplesService;