chore(deps): update dependency com.google.cloud:google-cloud-dlp to v2.2.3 (#370)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-dlp](https://togithub.com/googleapis/java-dlp) | patch | `2.2.2` -> `2.2.3` |

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### Release Notes

<details>
<summary>googleapis/java-dlp</summary>

### [`v2.2.3`](https://togithub.com/googleapis/java-dlp/blob/master/CHANGELOG.md#&#8203;223-httpswwwgithubcomgoogleapisjava-dlpcomparev222v223-2020-12-08)

[Compare Source](https://togithub.com/googleapis/java-dlp/compare/v2.2.2...v2.2.3)

</details>

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dlp/snippets/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-dlp</artifactId>
-      <version>2.2.2</version>
+      <version>2.2.3</version>
     </dependency>
     <!-- [END dlp_install_without_bom] -->