Bump protobuf-java from 3.5.1 to 3.16.1 in /meta

Bumps [protobuf-java](https://github.com/protocolbuffers/protobuf) from 3.5.1 to 3.16.1.
- [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/v3.5.1...v3.16.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/meta/pom.xml b/meta/pom.xml
index 19c66e6..f62ba3f 100644
--- a/meta/pom.xml
+++ b/meta/pom.xml
@@ -89,7 +89,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.5.1</version>
+            <version>3.16.1</version>
         </dependency>
         <!-- protostuff -->
         <dependency>