QT_NO_CONTEXTLESS_CONNECT: docs tidies

Missing verb from sentence...

Change-Id: If0afbe3cb7197ec620a61e0b90e379592b581d74
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qobject.cpp

@@ -4859,7 +4859,7 @@ QDebug operator<<(QDebug dbg, const QObject *o)
     \relates QObject
     \since 6.7
 
-    Defining this macro will the overload of QObject::connect() that
+    Defining this macro will disable the overload of QObject::connect() that
     connects a signal to a functor, without also specifying a QObject
     as a receiver/context object (that is, the 3-arguments overload
     of QObject::connect()).