Update dependencies on '6.3.1' in qt/qtlanguageserver

Change-Id: I849be530ee98a9c07cc67a0372a159e78d299d38
Reviewed-by: Qt Submodule Update Bot <qt_submodule_update_bot@qt-project.org>

dependencies.yaml

 dependencies:
   ../qtbase:
-    ref: 8727d61475adee633edfb483eca53752694935fd
+    ref: 8483dcde90f40cdfd0a0ec4245b03610b46b6cae
     required: true