deps: update dependency io.grpc:grpc-bom to v1.43.2 (#665)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.grpc:grpc-bom](https://github.com/grpc/grpc-java) | `1.43.1` -> `1.43.2` | [![age](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-bom/1.43.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-bom/1.43.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-bom/1.43.2/compatibility-slim/1.43.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-bom/1.43.2/confidence-slim/1.43.1)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>grpc/grpc-java</summary>

### [`v1.43.2`](https://github.com/grpc/grpc-java/releases/v1.43.2)

[Compare Source](https://github.com/grpc/grpc-java/compare/v1.43.1...v1.43.2)

##### Dependencies

-   Upgraded Protobuf to 3.19.2 to avoid CVE-2021-22569. See the [protobuf advisory](https://github.com/protocolbuffers/protobuf/security/advisories/GHSA-wrvw-hg22-4m67)

</details>

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pom.xml

@@ -159,7 +159,7 @@
     <google.api.version>1.33.0</google.api.version>
     <google.http.version>1.41.0</google.http.version>
     <graalvm.version>22.0.0</graalvm.version>
-    <grpc.version>1.43.1</grpc.version>
+    <grpc.version>1.43.2</grpc.version>
     <protobuf.version>3.19.3</protobuf.version>
     <opencensus.version>0.30.0</opencensus.version>
     <annotations-api.version>1.3.2</annotations-api.version>