Update prefect_snowflake/credentials.py

Co-authored-by: Alexander Streed <desertaxle@users.noreply.github.com>

prefect_snowflake/credentials.py

@@ -116,6 +116,6 @@ def _validate_okta_kwargs(cls, values):
         if authenticator == "okta_endpoint" and not okta_endpoint:
             raise ValueError(
                 "If authenticator is set to `okta_endpoint`, "
-                "`okta_endpoint` must be provided\n"
+                "`okta_endpoint` must be provided"
             )
         return values