Fix deprecated alias for toggling hunks (#23818)

Release Notes:

- N/A

crates/editor/src/actions.rs

@@ -397,4 +397,4 @@ gpui::actions!(
 action_as!(go_to_line, ToggleGoToLine as Toggle);
 
 action_with_deprecated_aliases!(editor, OpenSelectedFilename, ["editor::OpenFile"]);
-action_with_deprecated_aliases!(editor, ToggleSelectedDiffHunks, ["editor::ToggleDiffHunk"]);
+action_with_deprecated_aliases!(editor, ToggleSelectedDiffHunks, ["editor::ToggleHunkDiff"]);