Update dependencies on 'dev' in qt/qtlanguageserver

Change-Id: I5083242e21f91b52ada54050e2e0a64f9636612c
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>

dependencies.yaml

 dependencies:
   ../qtbase:
-    ref: 01780d753e960133ae0110c6ef4292fbd2ea306c
+    ref: 6a027a8677888bcc881929f47185603778e4c50e
     required: true