Bump protobuf-java from 2.4.0a to 3.16.3 in /protobuf-2.4.0a

Bumps [protobuf-java](https://github.com/protocolbuffers/protobuf) from 2.4.0a to 3.16.3.
- [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/commits/v3.16.3)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/protobuf-2.4.0a/pom.xml b/protobuf-2.4.0a/pom.xml
index e77981d..b4b3d64 100644
--- a/protobuf-2.4.0a/pom.xml
+++ b/protobuf-2.4.0a/pom.xml
@@ -38,7 +38,7 @@
     <properties>
         <pkgGroupId>com.google.protobuf</pkgGroupId>
         <pkgArtifactId>protobuf-java</pkgArtifactId>
-        <pkgVersion>2.4.0a</pkgVersion>
+        <pkgVersion>3.16.3</pkgVersion>
         <servicemix.osgi.export.pkg>
             com.google.protobuf
         </servicemix.osgi.export.pkg>