Bump com.google.protobuf:protobuf-java (#750)

Bumps [com.google.protobuf:protobuf-java](https://github.com/protocolbuffers/protobuf) from 3.19.4 to 3.19.6.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](https://github.com/protocolbuffers/protobuf/compare/v3.19.4...v3.19.6)

---
updated-dependencies:
- dependency-name: com.google.protobuf:protobuf-java
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/java_interop/service_discovery/interface/java-server/pom.xml b/java_interop/service_discovery/interface/java-server/pom.xml
index d56d041..3c297bb 100644
--- a/java_interop/service_discovery/interface/java-server/pom.xml
+++ b/java_interop/service_discovery/interface/java-server/pom.xml
@@ -53,7 +53,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.19.4</version>
+            <version>3.19.6</version>
         </dependency>
         <dependency>
             <groupId>org.apache.dubbo</groupId>