[mirotalksfu] - update widget example [skip ci]

widgets/example-5.html

@@ -18,6 +18,7 @@
                     audio: 0,
                     video: 0,
                     screen: 0,
+                    chat: 0,
                     hide: 0,
                     notify: 0,
                     duration: 'unlimited', // HH:MM:SS