chore: fix typo

Author: matthiasharzer

README.md

@@ -499,7 +499,7 @@ await event_types.aclose()
 ```
 
 ### Listing A Specific Event Type
-To list a specific event type, call the `read_event_type` function with the event type as an argument. The function returns an the detailed event type, which includes the schema:
+To list a specific event type, call the `read_event_type` function with the event type as an argument. The function returns the detailed event type, which includes the schema:
 
 ```python
 event_type = await client.read_event_type("io.eventsourcingdb.library.book-acquired")