test(smoothScroll): cast mock to the proper type

src/shared/lib/utils/smoothScroll/smoothScroll.test.ts

@@ -18,7 +18,7 @@ describe('smoothScroll', () => {
     beforeEach(() => {
         // Mock scrollIntoView
         mockScrollIntoView = vi.fn();
-        HTMLElement.prototype.scrollIntoView = mockScrollIntoView;
+        HTMLElement.prototype.scrollIntoView = mockScrollIntoView as (arg?: boolean | ScrollIntoViewOptions) => void;
 
         // Mock history.pushState
         mockPushState = vi.fn();