Update docker file to work on the latest GraalVM.

Dependencies

• [2] GMY3U7Y6 First commit with image for clojure + graal.

Change contents

• replacement in build/clojure-graal/Dockerfile at line 10
  [2.291]→[2.291:442](∅→∅)
  − RUN wget -O /tmp/graalvm-ce.tgz https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-20.3.0/graalvm-ce-java11-linux-amd64-20.3.0.tar.gz \
  [2.291]

  [2.442]
  + RUN wget -O /tmp/graalvm-ce.tgz https://github.com/graalvm/graalvm-ce-builds/releases/download/vm-21.0.0/graalvm-ce-java11-linux-amd64-21.0.0.tar.gz \