Update dependencies on '6.3.0' in qt/qtlanguageserver

Change-Id: I1b54f40d7e391c935f544835b29e8db7cff0d4e1
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>

dependencies.yaml

 dependencies:
   ../qtbase:
-    ref: 37b0f2003c482a1f64c895efab1522bbb30de746
+    ref: 136407e3eb88b5480cf5a37e9234e698ef6cff2d
     required: true