Fix padding for end_hover_slot on ListItems (#15598)

Release Notes:

- N/A

Co-authored-by: Nathan <nathan@zed.dev>

crates/ui/src/components/list/list_item.rs

@@ -260,7 +260,7 @@ impl RenderOnce for ListItem {
                             h_flex()
                                 .h_full()
                                 .absolute()
-                                .right_2()
+                                .right_1p5()
                                 .top_0()
                                 .visible_on_hover("list_item")
                                 .child(end_hover_slot),