Update dependencies on '6.2.0' in qt/qtshadertools

Change-Id: I904e24489f5082a14a2e170867eed7951bb6eab8
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>

dependencies.yaml

 dependencies:
   ../qtbase:
-    ref: a4e41e7ac42f835015bdca395a34e5bca7eda86c
+    ref: cc60cf83db6bbf9775b1f7747a48d6b7eb24e585
     required: true