Fix DejaVu fonts URL

http://dejavu-fonts.org is something else nowadays

Change-Id: Idb03b864fb145b016ce4ae1a2f0df02ff80280a8
Reviewed-by: Rolland Dudemaine <rolland.dudemaine@esol.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

src/platformsupport/fontdatabases/freetype/qfreetypefontdatabase.cpp

@@ -63,7 +63,7 @@ void QFreeTypeFontDatabase::populateFontDatabase()
 
     if (!dir.exists()) {
         qWarning("QFontDatabase: Cannot find font directory %s.\n"
-                 "Note that Qt no longer ships fonts. Deploy some (from http://dejavu-fonts.org for example) or switch to fontconfig.",
+                 "Note that Qt no longer ships fonts. Deploy some (from https://dejavu-fonts.github.io/ for example) or switch to fontconfig.",
                  qPrintable(fontpath));
         return;
     }