Use Yu Gothic UI as the main fallback font for Japanese

Using MS Gothic UI as the fallback on Japanese locale has been
outdated for many years. The default font on Japanese is Yu Gothic UI,
and this caused mismatches between Japanese text when using the
fallback and when just relying on the default.

[ChangeLog][Text] Made the primary fallback font on Japanese
locale "Yu Gothic UI" (the default system font).

Fixes: QTBUG-96689
Pick-to: 6.2
Change-Id: I9cf34410619ff4a2ceb9b03d523018c5061c3634
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

src/gui/text/windows/qwindowsfontdatabasebase.cpp

@@ -883,6 +883,7 @@ static const char *other_tryFonts[] = {
 };
 
 static const char *jp_tryFonts [] = {
+    "Yu Gothic UI",
     "MS UI Gothic",
     "Arial",
     "Gulim",