Bump protobuf-java from 2.6.1 to 3.16.1 in /core#17

dependabot[bot] wants to merge 1 commit intomasterPACCommunity/pacj:masterfrom

dependabot/maven/core/com.google.protobuf-protobuf-java-3.16.1PACCommunity/pacj:dependabot/maven/core/com.google.protobuf-protobuf-java-3.16.1Copy head branch name to clipboard