✅ Add 1ms timeout

Adding a short timeout when waiting for ResizeObserver in modal helper
test seems to fix failing tests

libs/designsystem/src/lib/testing/test-helper.ts

@@ -147,7 +147,7 @@ export class TestHelper {
   }
 
   public static waitForResizeObserver(): Promise<void> {
-    return TestHelper.waitForTimeout();
+    return TestHelper.waitForTimeout(1);
   }
 
   public static waitForTimeout(timeoutInMs?: number): Promise<void> {