fix(docs): typo in snowflake do_connect kwargs

Correcting the spelling of the word "additional"

Author: IndexSeek

ibis/backends/snowflake/__init__.py

@@ -160,7 +160,7 @@ def do_connect(
         connect_args
             Additional arguments passed to the SQLAlchemy engine creation call.
         kwargs:
-            Additiional arguments passed to the SQLAlchemy URL constructor.
+            Additional arguments passed to the SQLAlchemy URL constructor.
             See https://docs.snowflake.com/en/developer-guide/python-connector/sqlalchemy#additional-connection-parameters
             for more details
         """