python312Packages.bokeh: fix build (add missing runtime dependency)

Signed-off-by: Ihar Hrachyshka <[e-mail]>

pkgs/development/python-modules/bokeh/default.nix

···
     geckodriver
     isort
     json5
-    narwhals
     nbconvert
     networkx
     psutil
···
     pyyaml
     tornado
     xyzservices
+    narwhals
   ];
 
   doCheck = false; # need more work