chore(deps): update dependency pandas to v1.5.0 (#511)

Author: renovate-bot

bigquery_storage/to_dataframe/requirements.txt

@@ -6,6 +6,6 @@ ipython===7.31.1; python_version == '3.7'
 ipython===8.0.1; python_version == '3.8'
 ipython==8.5.0; python_version >= '3.9'
 pandas===1.3.5; python_version == '3.7'
-pandas==1.4.4; python_version > '3.7'
+pandas==1.5.0; python_version > '3.7'
 tqdm==4.64.1
 db-dtypes==1.0.3