BUG: Fix ctkCoreSettingsTest testMultiplePaths on Windows

Follow-up on commit f0bb5d7 (ENH: Allow saving relative paths to settings)
where the test case was incorrectly specified.

It fixes the following error:

10: FAIL!  : ctkCoreSettingsTester::testMultiplePaths(windows-style absolute paths) Compared lists differ at index 0.
10:    Actual   (settings.value(key).toStringList()): "d:/windows/path/internal/dir"
10:    Expected (expectedStoredValues): "<APPLICATION_HOME_DIR>/internal/dir"
10: C:\path\to\CTK\Libs\Core\Testing\Cpp\ctkCoreSettingsTest.cpp(115) : failure location

Libs/Core/Testing/Cpp/ctkCoreSettingsTest.cpp

@@ -139,7 +139,7 @@ void ctkCoreSettingsTester::testMultiplePaths_data()
     << (QStringList() << "<APPLICATION_HOME_DIR>/internal/dir");
 
   QTest::newRow("windows-style absolute paths") << "c:/windows/path"
-    << (QStringList() << "d:/windows/path/internal/dir" << "c:/windows/external/subdir/file.txt")
+    << (QStringList() << "c:/windows/path/internal/dir" << "c:/windows/external/subdir/file.txt")
     << (QStringList() << "<APPLICATION_HOME_DIR>/internal/dir" << "c:/windows/external/subdir/file.txt");
 #endif