Fix typo (#102)

* Fix typo

* Again

Author: davidbrochart

docs/user_guide/defining-schema.md

@@ -10,7 +10,7 @@ A common pattern is to define these schemas in separate files and register them
 schema_filepath = Path("/path/to/schema.yaml")
 
 logger = EventLogger()
-logger.register_event_schema(schema_file)
+logger.register_event_schema(schema_filepath)
 ```
 
 Note that a file path passed to `register_event_schema()` **must** be a Pathlib

docs/user_guide/first-event.md

@@ -39,7 +39,7 @@ handler = StreamHandler()
 logger.register_handler(handler)
 ```
 
-The logger knows about the event and where to send it; all that's left is to emit an instance of the event! To to do this, call the `.emit(...)` method and set the (required) `schema_id` and `data` arguments.
+The logger knows about the event and where to send it; all that's left is to emit an instance of the event! To do this, call the `.emit(...)` method and set the (required) `schema_id` and `data` arguments.
 
 ```python
 from jupyter_events import Event