message: Modify Athena connection description
diff: @@ -364,11 +364,11 @@ Where you need to escape/encode at least the s3_staging_dir, i.e., ::
  s3://... -> s3%3A//...
  -You can also use `PyAthena` library
  +You can also use `PyAthena` library(no java required) like this ::
  awsathena+rest://{aws_access_key_id}:{aws_secret_access_key}@athena.{region_name}.amazonaws.com/{schema_name}?s3_staging_dir={s3_staging_dir}&...
  -_(See more details at https://github.com/laughingman7743/PyAthena#sqlalchemy.)_
  +See `PyAthena <https://github.com/laughingman7743/PyAthena#sqlalchemy>`_.
  Snowflake
  ---------
  @@ -386,7 +386,7 @@ Make sure the user has privileges to access and use all required
  databases/schemas/tables/views/warehouses, as the Snowflake SQLAlchemy engine does
  not test for user rights during engine creation.
  -_(See more details at https://github.com/snowflakedb/snowflake-sqlalchemy.)_
  +See `Snowflake SQLAlchemy <https://github.com/snowflakedb/snowflake-sqlalchemy>`_.
  Caching
  -------
  