chore(deps): update dependency google-cloud-translate to v3.4.0 (GoogleCloudPlatform#6641)

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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) | `==3.3.2` -> `==3.4.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.4.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.4.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.4.0/compatibility-slim/3.3.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-translate/3.4.0/confidence-slim/3.3.2)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v3.4.0`](https://togithub.com/googleapis/python-translate/blob/master/CHANGELOG.md#&#8203;340-httpswwwgithubcomgoogleapispython-translatecomparev332v340-2021-08-29)

[Compare Source](https://togithub.com/googleapis/python-translate/compare/v3.3.2...v3.4.0)

##### Features

-   add translate_document and batch_translate_document ([#&GoogleCloudPlatform#8203;234](https://www.togithub.com/googleapis/python-translate/issues/234)) ([b5962d6](https://www.github.com/googleapis/python-translate/commit/b5962d68051d7dc6e4213c78d21ab3bbea1411f5))
-   **v3beta1:** add format_conversions ([b5962d6](https://www.github.com/googleapis/python-translate/commit/b5962d68051d7dc6e4213c78d21ab3bbea1411f5))

##### Bug Fixes

-   add missing annotation for batch document translation ([#&GoogleCloudPlatform#8203;231](https://www.togithub.com/googleapis/python-translate/issues/231)) ([a1297ba](https://www.github.com/googleapis/python-translate/commit/a1297ba6079524f82588c3fe79ec3f5c433a7606))

##### [3.3.2](https://www.github.com/googleapis/python-translate/compare/v3.3.1...v3.3.2) (2021-07-29)

##### Bug Fixes

-   enable self signed jwt for grpc ([#&GoogleCloudPlatform#8203;215](https://www.togithub.com/googleapis/python-translate/issues/215)) ([2f1bc32](https://www.github.com/googleapis/python-translate/commit/2f1bc327fd436f2f7e86c676cbbf1e7d7cc61921))

##### Documentation

-   add Samples section to CONTRIBUTING.rst ([#&GoogleCloudPlatform#8203;206](https://www.togithub.com/googleapis/python-translate/issues/206)) ([6f1df67](https://www.github.com/googleapis/python-translate/commit/6f1df6794394bcbedb18199793aaebb9c095ccf5))

##### Miscellaneous Chores

-   release as 3.3.2 ([#&GoogleCloudPlatform#8203;218](https://www.togithub.com/googleapis/python-translate/issues/218)) ([e14de99](https://www.github.com/googleapis/python-translate/commit/e14de99d9d3480274ba92ef36c93f0b626a2bd91))

##### [3.3.1](https://www.github.com/googleapis/python-translate/compare/v3.3.0...v3.3.1) (2021-07-21)

##### Bug Fixes

-   **deps:** pin 'google-{api,cloud}-core', 'google-auth' to allow 2.x versions ([#&GoogleCloudPlatform#8203;205](https://www.togithub.com/googleapis/python-translate/issues/205)) ([3a11025](https://www.github.com/googleapis/python-translate/commit/3a1102560ab70f8a7021f3b4f024e3e9feb134fe))

</details>

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functions/ocr/app/requirements.txt

@@ -1,4 +1,4 @@
 google-cloud-pubsub==2.7.1
 google-cloud-storage==1.42.0
-google-cloud-translate==3.3.2
+google-cloud-translate==3.4.0
 google-cloud-vision==2.4.2