message: Centos: Switch to bazel4 (a recent protobuffer change requires that)
diff: @@ -11,6 +11,6 @@ RUN java -version
  RUN javac -version
  ADD https://copr.fedorainfracloud.org/coprs/vbatts/bazel/repo/epel-$TARGET_VERSION/vbatts-bazel-epel-$TARGET_VERSION.repo /etc/yum.repos.d
  -RUN yum install -y --nogpgcheck bazel3
  +RUN yum install -y --nogpgcheck bazel4
  RUN bazel --version
  