Use read-only access methods for read-only entity operations (#31479)

Another follow-up to #31254

Release Notes:

- N/A

crates/tasks_ui/src/modal.rs

@@ -1176,7 +1176,7 @@ mod tests {
         scheduled_task_label: &str,
         cx: &mut VisualTestContext,
     ) {
-        let scheduled_task = tasks_picker.update(cx, |tasks_picker, _| {
+        let scheduled_task = tasks_picker.read_with(cx, |tasks_picker, _| {
             tasks_picker
                 .delegate
                 .candidates
@@ -1220,14 +1220,14 @@ mod tests {
         spawn_tasks: &Entity<Picker<TasksModalDelegate>>,
         cx: &mut VisualTestContext,
     ) -> String {
-        spawn_tasks.update(cx, |spawn_tasks, cx| spawn_tasks.query(cx))
+        spawn_tasks.read_with(cx, |spawn_tasks, cx| spawn_tasks.query(cx))
     }
 
     fn task_names(
         spawn_tasks: &Entity<Picker<TasksModalDelegate>>,
         cx: &mut VisualTestContext,
     ) -> Vec<String> {
-        spawn_tasks.update(cx, |spawn_tasks, _| {
+        spawn_tasks.read_with(cx, |spawn_tasks, _| {
             spawn_tasks
                 .delegate
                 .matches

crates/tasks_ui/src/tasks_ui.rs

@@ -300,9 +300,12 @@ pub fn task_contexts(
         .unwrap_or_default();
 
     let latest_selection = active_editor.as_ref().map(|active_editor| {
-        active_editor.update(cx, |editor, _| {
-            editor.selections.newest_anchor().head().text_anchor
-        })
+        active_editor
+            .read(cx)
+            .selections
+            .newest_anchor()
+            .head()
+            .text_anchor
     });
 
     let mut worktree_abs_paths = workspace
@@ -412,7 +415,7 @@ mod tests {
         )
         .await;
         let project = Project::test(fs, [path!("/dir").as_ref()], cx).await;
-        let worktree_store = project.update(cx, |project, _| project.worktree_store().clone());
+        let worktree_store = project.read_with(cx, |project, _| project.worktree_store().clone());
         let rust_language = Arc::new(
             Language::new(
                 LanguageConfig::default(),