Handle buffer diff base updates and file renames properly for SSH projects (#14989)

Release Notes:

- N/A

---------

Co-authored-by: Conrad <conrad@zed.dev>

crates/outline/src/outline.rs

@@ -321,7 +321,7 @@ mod tests {
         let (workspace, cx) = cx.add_window_view(|cx| Workspace::test_new(project.clone(), cx));
         let worktree_id = workspace.update(cx, |workspace, cx| {
             workspace.project().update(cx, |project, cx| {
-                project.worktrees().next().unwrap().read(cx).id()
+                project.worktrees(cx).next().unwrap().read(cx).id()
             })
         });
         let _buffer = project