editor: Fix unwrap_syntax_node panicking by not setting selections (#38329)

Fixes ZED-11T

Release Notes:

- N/A *or* Added/Fixed/Improved ...

crates/vim/src/normal/mark.rs

@@ -22,7 +22,7 @@ impl Vim {
         self.update_editor(cx, |vim, editor, cx| {
             let anchors = editor
                 .selections
-                .disjoint_anchors()
+                .disjoint_anchors_arc()
                 .iter()
                 .map(|s| s.head())
                 .collect::<Vec<_>>();