Switch to QT Category logging (#2206)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/common/NetworkRequest.cpp

@@ -12,6 +12,7 @@
 #include <QDebug>
 #include <QFile>
 #include <QtConcurrent>
+#include "common/QLogging.hpp"
 
 #include <cassert>
 
@@ -167,7 +168,7 @@ void NetworkRequest::execute()
     if (this->data->cache_ &&
         this->data->requestType_ != NetworkRequestType::Get)
     {
-        qDebug() << "Can only cache GET requests!";
+        qCDebug(chatterinoCommon) << "Can only cache GET requests!";
         this->data->cache_ = false;
     }