113319: Fix dropdown component spec

(cherry picked from commit 70357803e86caabc6357b7cbec9db1ef8edd2a56)

Author: AAwouters

src/app/shared/form/builder/ds-dynamic-form-ui/models/scrollable-dropdown/dynamic-scrollable-dropdown.component.spec.ts

@@ -186,7 +186,7 @@ describe('Dynamic Dynamic Scrollable Dropdown component', () => {
         scrollableDropdownFixture.detectChanges();
 
         de = scrollableDropdownFixture.debugElement.queryAll(By.css('button.dropdown-item'));
-        btnEl = de[0].nativeElement;
+        btnEl = de[1].nativeElement;
 
         btnEl.dispatchEvent(mousedownEvent);
         scrollableDropdownFixture.detectChanges();