message: ci: update public image
  To
diff: #!/bin/bash
  -ENVOY_BUILD_SHA=f7f2a34fe7dcfb39a81ed21728c8df2af223bbb0
  +ENVOY_BUILD_SHA=22c55f8ec756c5ddeb26c3424e128a91aec23116
  # Script that lists all the steps take by the CI system when doing Envoy builds.
  set -e
  