update panic message

src/main.rs

@@ -56,7 +56,7 @@ async fn main() {
                     for (i, item) in items.into_iter().enumerate() {
                         if !channel_item_id_regex.is_match(&item.id) {
                             panic!(
-                                "received unexpected item ID `{}`; unsafe to continue in the exec context",
+                                "API returned unexpected item ID `{}`; unsafe to continue in the exec context",
                                 &item.id
                             )
                         }