Use the new buffer subscription API to keep DisplayMap in sync

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

crates/editor/src/editor.rs

@@ -3466,7 +3466,7 @@ impl Editor {
         cx: &mut ViewContext<Self>,
     ) {
         match event {
-            language::Event::Edited(_) => cx.emit(Event::Edited),
+            language::Event::Edited => cx.emit(Event::Edited),
             language::Event::Dirtied => cx.emit(Event::Dirtied),
             language::Event::Saved => cx.emit(Event::Saved),
             language::Event::FileHandleChanged => cx.emit(Event::FileHandleChanged),