chore(deps): update dependency google-cloud-bigquery to v2.28.0 (#61)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-bigquery](https://togithub.com/googleapis/python-bigquery) | `==2.27.1` -> `==2.28.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.28.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.28.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.28.0/compatibility-slim/2.27.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.28.0/confidence-slim/2.27.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.28.0`](https://togithub.com/googleapis/python-bigquery/blob/master/CHANGELOG.md#&#8203;2280-httpswwwgithubcomgoogleapispython-bigquerycomparev2271v2280-2021-09-30)

[Compare Source](https://togithub.com/googleapis/python-bigquery/compare/v2.27.1...v2.28.0)

##### Features

-   add `AvroOptions` to configure AVRO external data ([#&#8203;994](https://www.togithub.com/googleapis/python-bigquery/issues/994)) ([1a9431d](https://www.github.com/googleapis/python-bigquery/commit/1a9431d9e02eeb99e4712b61c623f9cca80134a6))

##### Documentation

-   link to stable pandas docs ([#&#8203;990](https://www.togithub.com/googleapis/python-bigquery/issues/990)) ([ea50e80](https://www.github.com/googleapis/python-bigquery/commit/ea50e8031fc035b3772a338bc00982de263cefad))

##### [2.27.1](https://www.github.com/googleapis/python-bigquery/compare/v2.27.0...v2.27.1) (2021-09-27)

##### Bug Fixes

-   remove py.typed since package fails mypy check ([#&#8203;988](https://www.togithub.com/googleapis/python-bigquery/issues/988)) ([39030f2](https://www.github.com/googleapis/python-bigquery/commit/39030f26ce081cfacd456b84694c68e3f04ed48d))

</details>

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contact-center-insights/snippets/requirements.txt

@@ -1,4 +1,4 @@
 google-api-core==2.0.1
-google-cloud-bigquery==2.27.1
+google-cloud-bigquery==2.28.0
 google-cloud-contact-center-insights==0.4.0
 protobuf==3.18.0