chore(deps): update dependency google-cloud-translate to v2.0.2 [(#4426)](GoogleCloudPlatform/python-docs-samples#4426)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [google-cloud-translate](https://togithub.com/googleapis/python-translate) | patch | `==2.0.1` -> `==2.0.2` |

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### Release Notes

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

### [`v2.0.2`](https://togithub.com/googleapis/python-translate/blob/master/CHANGELOG.md#&#8203;202-httpswwwgithubcomgoogleapispython-translatecomparev201v202-2020-08-03)

[Compare Source](https://togithub.com/googleapis/python-translate/compare/v2.0.1...v2.0.2)

</details>

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samples/snippets/requirements.txt

@@ -1,3 +1,3 @@
-google-cloud-translate==2.0.1
+google-cloud-translate==2.0.2
 google-cloud-storage==1.29.0
 google-cloud-automl==1.0.1