chore(deps): update dependency google-cloud-logging to v2.5.0 (#326)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-logging](https://togithub.com/googleapis/python-logging) | `==2.4.0` -> `==2.5.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-logging/2.5.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-logging/2.5.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-logging/2.5.0/compatibility-slim/2.4.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-logging/2.5.0/confidence-slim/2.4.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.5.0`](https://togithub.com/googleapis/python-logging/blob/master/CHANGELOG.md#&#8203;250-httpswwwgithubcomgoogleapispython-loggingcomparev240v250-2021-06-10)

[Compare Source](https://togithub.com/googleapis/python-logging/compare/v2.4.0...v2.5.0)

##### Features

-   support AuditLog and RequestLog protos ([#&#8203;274](https://www.github.com/googleapis/python-logging/issues/274)) ([5d91be9](https://www.github.com/googleapis/python-logging/commit/5d91be9f121c364cbd53c6a9fffc4fb6ca6bd324))

##### Bug Fixes

-   **deps:** add packaging requirement ([#&#8203;300](https://www.github.com/googleapis/python-logging/issues/300)) ([68c5cec](https://www.github.com/googleapis/python-logging/commit/68c5ceced3288253af8e3c6013a35fa3954b37bc))
-   structured log handler formatting issues ([#&#8203;319](https://www.github.com/googleapis/python-logging/issues/319)) ([db9da37](https://www.github.com/googleapis/python-logging/commit/db9da3700511b5a24c3c44c9f4377705937caf46))

</details>

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packages/google-cloud-logging/samples/snippets/requirements.txt

@@ -1,4 +1,4 @@
-google-cloud-logging==2.4.0
+google-cloud-logging==2.5.0
 google-cloud-bigquery==2.20.0
 google-cloud-storage==1.38.0
 google-cloud-pubsub==2.5.0