Update MainWindow.cpp

fixed small typo in the warning about 0.22 being dev version not for production use

src/Gui/MainWindow.cpp

@@ -1714,7 +1714,7 @@ void MainWindow::renderDevBuildWarning(
 
     // Construct the lines of text and figure out how much space they need
     const auto devWarningLine1 = tr("WARNING: This is a development version.");
-    const auto devWarningLine2 = tr("Please do not use in a production environment.");
+    const auto devWarningLine2 = tr("Please do not use it in a production environment.");
     QFontMetrics fontMetrics(painter.font()); // Try to use the existing font
     int padding = QtTools::horizontalAdvance(fontMetrics, QLatin1String("M")); // Arbitrary
     int line1Width = QtTools::horizontalAdvance(fontMetrics, devWarningLine1);