fix: fix initial render of AvatarStack stories in StrictMode (#2497)

Author: astandrik

src/components/AvatarStack/__stories__/AvatarStack.stories.tsx

@@ -34,6 +34,7 @@ function getChildren({
                 borderColor={'var(--g-color-line-generic-solid)'}
                 aria-label={'For tests'}
                 alt={'For tests'}
+                key={faker.string.uuid()}
             />
         ),
         count,