Fix a typo: "occurences" -> "occurrences" (#2387)

Author: GameRoMan

tests/lib/chat/_utils.py

@@ -28,7 +28,7 @@ def __repr_args__(self: pydantic.BaseModel) -> ReprArgs:
 
         string = rich_print_str(obj)
 
-        # we remove all `fn_name.<locals>.` occurences
+        # we remove all `fn_name.<locals>.` occurrences
         # so that we can share the same snapshots between
         # pydantic v1 and pydantic v2 as their output for
         # generic models differs, e.g.