stories: Get OverflowScrollStory to scroll again (#15982)

This makes it at least scroll again, but it doesn't scroll down to the
last element yet. We haven't figured out why yet.


Release Notes:

- N/A

Co-authored-by: Bennet <bennet@zed.dev>
Co-authored-by: Antonio <antonio@zed.dev>

crates/storybook/src/stories/overflow_scroll.rs

@@ -25,6 +25,8 @@ impl Render for OverflowScrollStory {
             .child(Story::label("`overflow_y_scroll`"))
             .child(
                 v_flex()
+                    .w_full()
+                    .flex_1()
                     .id("overflow_y_scroll")
                     .gap_2()
                     .overflow_y_scroll()