deps: update dependency com.google.protobuf:protobuf-java-util to v3.21.4 (#842)

Author: renovate-bot

datacatalog/snippets/pom.xml

@@ -47,7 +47,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
-      <version>3.21.2</version>
+      <version>3.21.4</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>