chore(deps): update dependency com.google.cloud:google-cloud-bigquery to v2.1.6 (#5927)
chore(deps): update dependency com.google.cloud:google-cloud-bigquery to v2.1.6 (#5927)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-bigquery](https://togithub.com/googleapis/java-bigquery) | `2.1.5` -> `2.1.6` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.1.6/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.1.6/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.1.6/compatibility-slim/2.1.5)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-bigquery/2.1.6/confidence-slim/2.1.5)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-bigquery</summary>

### [`v2.1.6`](https://togithub.com/googleapis/java-bigquery/blob/master/CHANGELOG.md#&#8203;216-httpswwwgithubcomgoogleapisjava-bigquerycomparev215v216-2021-09-02)

[Compare Source](https://togithub.com/googleapis/java-bigquery/compare/v2.1.5...v2.1.6)

</details>

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