Reference proper SplitBehaviour enum in docs

QString::SkipEmptyParts is Qt::SkipEmptyParts now.

Pick-to: 5.15
Change-Id: Ie351bbe9d2350e771f821a9f0bc9f581be5b0022
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>

src/corelib/text/qstring.cpp

@@ -7286,7 +7286,7 @@ static ResultList splitString(const StringSource &source, QStringView sep,
     \a cs specifies whether \a sep should be matched case
     sensitively or case insensitively.
 
-    If \a behavior is QString::SkipEmptyParts, empty entries don't
+    If \a behavior is Qt::SkipEmptyParts, empty entries don't
     appear in the result. By default, empty entries are kept.
 
     Example:

src/corelib/text/qstringtokenizer.cpp

@@ -238,7 +238,7 @@ QT_BEGIN_NAMESPACE
     \a cs specifies whether \a needle should be matched case
     sensitively or case insensitively.
 
-    If \a sb is QString::SkipEmptyParts, empty entries don't
+    If \a sb is Qt::SkipEmptyParts, empty entries don't
     appear in the result. By default, empty entries are included.
 
     \sa QStringView::split(), QString::split(), Qt::CaseSensitivity, Qt::SplitBehavior