chore(deps): update dependency google-cloud-translate to v3.8.4 (#511)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-translate](https://togithub.com/googleapis/python-translate) | `==3.8.3` -> `==3.8.4` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.8.4/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.8.4/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.8.4/compatibility-slim/3.8.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.8.4/confidence-slim/3.8.3)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v3.8.4`](https://togithub.com/googleapis/python-translate/blob/HEAD/CHANGELOG.md#&#8203;384-httpsgithubcomgoogleapispython-translatecomparev383v384-2022-10-07)

[Compare Source](https://togithub.com/googleapis/python-translate/compare/v3.8.3...v3.8.4)

##### Bug Fixes

-   **deps:** Allow protobuf 3.19.5 ([#&#8203;457](https://togithub.com/googleapis/python-translate/issues/457)) ([e3ce689](https://togithub.com/googleapis/python-translate/commit/e3ce689f23cf1b081705ccb9c7fbd31d79cb44e5))

</details>

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background/function/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-translate==3.8.3
+google-cloud-translate==3.8.4
 google-cloud-firestore==2.7.2