Make the same change to outdated/win/Qt3/qt3_win.cpp for the
"about nethack" popup that was just made to win/Qt/qt_main.cpp so
that the out of date URLs won't be overlooked if the Qt 3 interface
ever gets resurrected.
Not tested and most likely will never matter.
If an old port is resurrected to work with current version code, its files
can be relocated to the appropriate sys or win folder as required.
In the meantime, the burden of upkeep can be avoided for the stuff in the
outdated folder for now.