Bump protobuf-java from 3.19.4 to 3.19.6

Bumps [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/generate_changelog.py)
- [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
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 1d6f650..0603054 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,7 +50,7 @@
     <version.lucene>7.1.0</version.lucene>
     <version.lucene-analyzers>4.0.0</version.lucene-analyzers>
     <version.minlog>1.2</version.minlog>
-    <version.protobuf>3.19.4</version.protobuf>
+    <version.protobuf>3.19.6</version.protobuf>
     <version.thrift>0.12.0</version.thrift>
   </properties>
   <dependencyManagement>