Fix typos discovered by codespell (#6718)

> codespell --skip="*.json,*.rtf" \

--ignore-words-list=crate,delet,inout,iterm,jumo,lightening,othe,ser,tabe,te,tese,thi,updat
* https://github.com/codespell-project/codespell/blob/master/README.rst

Release Notes:

- N/A

crates/zed/src/zed.rs

@@ -143,7 +143,7 @@ pub fn initialize_workspace(app_state: Arc<AppState>, cx: &mut AppContext) {
         cx.on_window_should_close(move |cx| {
             handle
                 .update(cx, |workspace, cx| {
-                    // We'll handle closing asynchoronously
+                    // We'll handle closing asynchronously
                     workspace.close_window(&Default::default(), cx);
                     false
                 })