log: [refactor] Use info level for init logs

This refactor does not change behavior.

src/qt/bitcoin.cpp

@@ -190,7 +190,7 @@ void DebugMessageHandler(QtMsgType type, const QMessageLogContext& context, cons
     if (type == QtDebugMsg) {
         LogDebug(BCLog::QT, "GUI: %s\n", msg.toStdString());
     } else {
-        LogPrintf("GUI: %s\n", msg.toStdString());
+        LogInfo("GUI: %s", msg.toStdString());
     }
 }