chore(deps): update dependency google-api-python-client to v2.21.0 (#…

…1525)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-api-python-client](https://togithub.com/googleapis/google-api-python-client) | `==2.20.0` -> `==2.21.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-api-python-client/2.21.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-api-python-client/2.21.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-api-python-client/2.21.0/compatibility-slim/2.20.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-api-python-client/2.21.0/confidence-slim/2.20.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/google-api-python-client</summary>

### [`v2.21.0`](https://togithub.com/googleapis/google-api-python-client/blob/master/CHANGELOG.md#&#8203;2210-httpswwwgithubcomgoogleapisgoogle-api-python-clientcomparev2200v2210-2021-09-14)

[Compare Source](https://togithub.com/googleapis/google-api-python-client/compare/v2.20.0...v2.21.0)

##### Features

-   **apigee:** update the api 0e4fed7 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **bigquery:** update the api 04e112c ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **bigtableadmin:** update the api 6b77931 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **cloudprofiler:** update the api 3009ee3 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **container:** update the api e5d01ec ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **dataproc:** update the api fec7356 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **displayvideo:** update the api 22caa4f ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **documentai:** update the api 444836b ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **healthcare:** update the api 2f3173a ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **ideahub:** update the api 8ebf9d2 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **memcache:** update the api 393dce7 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **mybusinesslodging:** update the api c51a0d1 ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **speech:** update the api bf6e86f ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **streetviewpublish:** update the api c8cf30c ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))
-   **youtube:** update the api 855cbfe ([e5e87b1](https://www.github.com/googleapis/google-api-python-client/commit/e5e87b1ca5fb6e81f6d83d970c3e4f683ecdcdea))

</details>

---

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samples/compute/requirements.txt

@@ -1,3 +1,3 @@
-google-api-python-client==2.20.0
+google-api-python-client==2.21.0
 google-auth==2.1.0
 google-auth-httplib2==0.1.0