chore(deps): update dependency google-cloud-bigquery-storage to v2.6.2 (

#6485)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-bigquery-storage](https://togithub.com/googleapis/python-bigquery-storage) | `==2.6.1` -> `==2.6.2` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery-storage/2.6.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery-storage/2.6.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery-storage/2.6.2/compatibility-slim/2.6.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery-storage/2.6.2/confidence-slim/2.6.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.6.2`](https://togithub.com/googleapis/python-bigquery-storage/blob/master/CHANGELOG.md#&#8203;262-httpswwwgithubcomgoogleapispython-bigquery-storagecomparev261v262-2021-07-28)

[Compare Source](https://togithub.com/googleapis/python-bigquery-storage/compare/v2.6.1...v2.6.2)

</details>

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bigquery/bqml/requirements.txt

@@ -1,5 +1,5 @@
 google-cloud-bigquery[pandas,bqstorage]==2.23.1
-google-cloud-bigquery-storage==2.6.1
+google-cloud-bigquery-storage==2.6.2
 pandas==1.1.5; python_version < '3.7'
 pandas==1.2.0; python_version > '3.6'
 pyarrow==4.0.1

bigquery/datalab-migration/requirements.txt

@@ -1,6 +1,6 @@
 grpcio==1.39.0
 google-cloud-bigquery[pandas,pyarrow]==2.23.1
-google-cloud-bigquery-storage==2.6.1
+google-cloud-bigquery-storage==2.6.2
 datalab==1.2.0
 ipython==7.18.1; python_version > '3.6'
 ipython==7.16.1; python_version < '3.7'

bigquery/pandas-gbq-migration/requirements.txt

@@ -1,5 +1,5 @@
 google-cloud-bigquery==2.23.1
-google-cloud-bigquery-storage==2.6.1
+google-cloud-bigquery-storage==2.6.2
 pandas==1.1.5; python_version < '3.7'
 pandas==1.2.4; python_version > '3.6'
 pandas-gbq==0.15.0; python_version > '3.6'