Fix missing escape sequence in /shrug command

Before the fix, the upper arm _ characters in the command's output would be parsed as Markdown italic formatting around the (ツ).


(cherry picked from commit 706f1f7836)

Co-authored-by: Veres Károly <mail+kde@karcsesz.hu>

src/libneochat/models/actionsmodel.cpp

@@ -59,7 +59,7 @@ QList<ActionsModel::Action> actions{
     Action{
         u"shrug"_s,
         [](const QString &message, NeoChatRoom *, ChatBarCache *) {
-            return u"¯\\\\_(ツ)_/¯ %1"_s.arg(message);
+            return u"¯\\\\\\_(ツ)\\_/¯ %1"_s.arg(message);
         },
         Quotient::RoomMessageEvent::MsgType::Text,
         kli18n("<message>"),