Fix reading reblog data only when presented and reblogged is status for signed in user not if status is a reblog

lib/serializers/mastodon/timeline_entry_mastodon_extensions.dart

@@ -60,7 +60,7 @@ extension TimelineEntryMastodonExtensions on TimelineEntry {
 
     late final String reshareAuthor;
     late final String reshareAuthorId;
-    if (isReshare) {
+    if (json['reblog'] != null) {
       final rebloggedUser =
           ConnectionMastodonExtensions.fromJson(json['reblog']['account']);
       connectionManager.addConnection(rebloggedUser);