feat: rename 3 (#23669)

Just a mechanical renaming

codex-rs/core/src/goals.rs

@@ -476,7 +476,7 @@ impl Session {
                     .thread_goals()
                     .update_thread_goal(
                         self.conversation_id,
-                        codex_state::ThreadGoalUpdate {
+                        codex_state::GoalUpdate {
                             objective: Some(objective.to_string()),
                             status: status.map(state_goal_status_from_protocol),
                             token_budget,
@@ -516,7 +516,7 @@ impl Session {
                 .thread_goals()
                 .update_thread_goal(
                     self.conversation_id,
-                    codex_state::ThreadGoalUpdate {
+                    codex_state::GoalUpdate {
                         objective: None,
                         status,
                         token_budget,

codex-rs/core/src/session/tests.rs

@@ -8620,7 +8620,7 @@ async fn external_goal_mutation_accounts_active_turn_before_status_change() -> a
         .thread_goals()
         .update_thread_goal(
             sess.conversation_id,
-            codex_state::ThreadGoalUpdate {
+            codex_state::GoalUpdate {
                 objective: None,
                 status: Some(codex_state::ThreadGoalStatus::Complete),
                 token_budget: None,