Fix calculation of schema location (#1239)

Co-authored-by: Zachary Sailer <[email protected]>
Co-authored-by: Steven Silvester <[email protected]>

jupyter_server/serverapp.py

@@ -1968,10 +1968,9 @@ def init_event_logger(self):
         ]
         for schema_id in schema_ids:
             # Get the schema path from the schema ID.
-            rel_schema_path = schema_id.lstrip(JUPYTER_SERVER_EVENTS_URI) + ".yaml"
+            rel_schema_path = schema_id.replace(JUPYTER_SERVER_EVENTS_URI + "/", "") + ".yaml"
             schema_path = DEFAULT_EVENTS_SCHEMA_PATH / rel_schema_path
             # Use this pathlib object to register the schema
-            # breakpoint()
             self.event_logger.register_event_schema(schema_path)
 
     def init_webapp(self):