chore(deps): update dependency db-dtypes to v1.0.4 (#514)

Author: renovate-bot

bigquery_storage/to_dataframe/requirements.txt

@@ -8,4 +8,4 @@ ipython==8.5.0; python_version >= '3.9'
 pandas===1.3.5; python_version == '3.7'
 pandas==1.5.0; python_version > '3.7'
 tqdm==4.64.1
-db-dtypes==1.0.3
+db-dtypes==1.0.4