Update dependencies on '6.4.1' in qt/qtshadertools

Change-Id: Ib63d152e86001d1b97a89cb48c2ee1fae34420e1
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>

dependencies.yaml

 dependencies:
   ../qtbase:
-    ref: 87a8f36ff74f80b4deff062eb585009fdd4c74cf
+    ref: 905755304a474c942346774d930b92e3665c1bab
     required: true