added const

packages/stream_chat_v1/lib/channel_page.dart

@@ -137,7 +137,7 @@ class _ChannelPageState extends State<ChannelPage> {
                         );
                       },
                       deletedBottomRowBuilder: (context, message) {
-                        return VisibleFootnote();
+                        return const VisibleFootnote();
                       },
                     );
                   },

packages/stream_chat_v1/lib/thread_page.dart

@@ -54,7 +54,7 @@ class _ThreadPageState extends State<ThreadPage> {
                 return defaultMessage.copyWith(
                   onReplyTap: _reply,
                   deletedBottomRowBuilder: (context, message) {
-                    return VisibleFootnote();
+                    return const VisibleFootnote();
                   },
                 );
               },