Fixed missing enum entry in Talk API

lib/api/marianumcloud/talk/chat/getChatResponse.dart

@@ -88,4 +88,5 @@ enum RichObjectStringObjectType {
   @JsonValue("file") file,
   @JsonValue("guest") guest,
   @JsonValue("highlight") highlight,
+  @JsonValue("talk-poll") talkPoll,
 }

lib/api/marianumcloud/talk/chat/getChatResponse.g.dart

@@ -96,4 +96,5 @@ const _$RichObjectStringObjectTypeEnumMap = {
   RichObjectStringObjectType.file: 'file',
   RichObjectStringObjectType.guest: 'guest',
   RichObjectStringObjectType.highlight: 'highlight',
+  RichObjectStringObjectType.talkPoll: 'talk-poll',
 };