QmlProject: Add link to warning

Change-Id: I57586c91701bb591702134740e1dda263f71644c
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Pranta Ghosh Dastider <pranta.dastider@qt.io>

src/plugins/qmlprojectmanager/qmlprojectexporter/cmakewriter.cpp

@@ -50,7 +50,9 @@ CMakeWriter::Ptr CMakeWriter::create(CMakeGenerator *parent)
         "The project was created with a Qt Design Studio version earlier than Qt Design Studio "
         "4.5. Due to limitations of the project structure in earlier Qt Design Studio versions, "
         "the resulting application might not display all the assets. Referring to "
-        "assets between different QML modules does not work in the compiled application.",
+        "assets between different QML modules does not work in the compiled application.<br>"
+        "<a href=\"https://doc.qt.io/qtdesignstudio/studio-designer-developer-workflow.html\">See "
+        "the documentation for details.</a>",
         buildSystem->projectFilePath());
 
     return std::make_unique<CMakeWriterV0>(parent);