Bump protobuf-java from 2.3.0 to 3.16.3 in /gwt-archetype-resources#16

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dependabot/maven/gwt-archetype-resources/com.google.protobuf-protobuf-java-3.16.3stswoon/projectForLessons:dependabot/maven/gwt-archetype-resources/com.google.protobuf-protobuf-java-3.16.3Copy head branch name to clipboard