Fix generation of versions for scala-cli-slim Docker image

Author: Gedochao

.github/scripts/publish-slim-docker-images.sh

@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
 set -eu
 
-SCALA_CLI_VERSION="$(./mill -i ci.publishVersion)"
+RAW_VERSION="$(./mill -i ci.publishVersion)"
+SCALA_CLI_VERSION="${RAW_VERSION##* }"
 
 docker tag scala-cli-slim virtuslab/scala-cli-slim:latest
 docker tag scala-cli-slim virtuslab/scala-cli-slim:"$SCALA_CLI_VERSION"