Fix the outline panel's focus tracking (#20083)

Closes https://github.com/zed-industries/zed/issues/20073

Release Notes:

- Fixed outline panel navigation
([https://github.com/zed-industries/zed/issues/20073](#20073))

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/outline_panel/src/outline_panel.rs

@@ -4261,7 +4261,7 @@ impl Render for OutlinePanel {
                     }
                 }),
             )
-            .track_focus(&self.focus_handle(cx))
+            .track_focus(&self.focus_handle)
             .when_some(search_query, |outline_panel, search_state| {
                 outline_panel.child(
                     v_flex()