deps: update dependency com.google.protobuf:protobuf-java to v3.21.2 (#1676)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.protobuf:protobuf-java](https://developers.google.com/protocol-buffers/) ([source](https://togithub.com/protocolbuffers/protobuf)) | `3.21.1` -> `3.21.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.2/compatibility-slim/3.21.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.protobuf:protobuf-java/3.21.2/confidence-slim/3.21.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>protocolbuffers/protobuf</summary>

### [`v3.21.2`](https://togithub.com/protocolbuffers/protobuf/compare/v3.21.1...v3.21.2)

[Compare Source](https://togithub.com/protocolbuffers/protobuf/compare/v3.21.1...v3.21.2)

</details>

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Author: renovate-bot

pom.xml

@@ -566,7 +566,7 @@
     <project.jsr305.version>3.0.2</project.jsr305.version>
     <project.gson.version>2.9.0</project.gson.version>
     <project.jackson-core2.version>2.13.3</project.jackson-core2.version>
-    <project.protobuf-java.version>3.21.1</project.protobuf-java.version>
+    <project.protobuf-java.version>3.21.2</project.protobuf-java.version>
     <project.guava.version>30.1.1-android</project.guava.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.httpclient.version>4.5.13</project.httpclient.version>