chore(deps): update dependency google-cloud-pubsub to v2.13.9 (#337)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-pubsub](https://togithub.com/googleapis/python-pubsub) | `==2.13.7` -> `==2.13.9` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-pubsub/2.13.9/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-pubsub/2.13.9/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-pubsub/2.13.9/compatibility-slim/2.13.7)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-pubsub/2.13.9/confidence-slim/2.13.7)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v2.13.9`](https://togithub.com/googleapis/python-pubsub/releases/tag/v2.13.9)

[Compare Source](https://togithub.com/googleapis/python-pubsub/compare/v2.13.7...v2.13.9)

##### Bug Fixes

-   **deps:** Allow protobuf 3.19.5 ([#&#8203;801](https://togithub.com/googleapis/python-pubsub/issues/801)) ([fa23503](https://togithub.com/googleapis/python-pubsub/commit/fa235033481783c2ec378b2a26b223bdff206461))

</details>

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

@@ -1,4 +1,4 @@
-google-cloud-pubsub==2.13.7
+google-cloud-pubsub==2.13.9
 google-cloud-containeranalysis==2.9.3
 grafeas==1.6.1
 pytest==7.1.3