Update shinylive lockfile

Author: wch

shinylive_lock.json

@@ -44,7 +44,7 @@
     "url": null,
     "depends": [
       {"name": "ipywidgets", "specs": [[">=", "7.6.5"]]},
-      {"name": "jupyter_core", "specs": []},
+      {"name": "jupyter-core", "specs": []},
       {"name": "shiny", "specs": [[">=", "0.6.1.9005"]]},
       {"name": "python-dateutil", "specs": [[">=", "2.8.2"]]},
       {"name": "anywidget", "specs": []}