chore(deps): update dependency com.google.cloud:google-cloud-document-ai to v0.8.2 (#473)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-document-ai](https://togithub.com/googleapis/java-document-ai) | `0.8.0` -> `0.8.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-document-ai/0.8.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-document-ai/0.8.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-document-ai/0.8.2/compatibility-slim/0.8.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-document-ai/0.8.2/confidence-slim/0.8.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/java-document-ai</summary>

### [`v0.8.2`](https://togithub.com/googleapis/java-document-ai/blob/master/CHANGELOG.md#&#8203;082-httpswwwgithubcomgoogleapisjava-document-aicomparev081v082-2021-05-13)

[Compare Source](https://togithub.com/googleapis/java-document-ai/compare/v0.8.1...v0.8.2)

### [`v0.8.1`](https://togithub.com/googleapis/java-document-ai/blob/master/CHANGELOG.md#&#8203;081-httpswwwgithubcomgoogleapisjava-document-aicomparev080v081-2021-05-11)

[Compare Source](https://togithub.com/googleapis/java-document-ai/compare/v0.8.0...v0.8.1)

</details>

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Author: renovate-bot

document-ai/snippets/pom.xml

@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-document-ai</artifactId>
-      <version>0.8.0</version>
+      <version>0.8.2</version>
     </dependency>
     <!-- [END documentai_install_with_bom] -->
     <dependency>