message: use lowercase for env names even if branch name consist uppercase symbols
diff: @@ -17,7 +17,7 @@ jobs:
  branch_name=$(hub branch | grep "*" | sed -e 's/^\*//')
  echo $branch_name
  echo ::set-output name=branch::${branch_name}
  - tag=$(echo $branch_name | sed 's/\//-/g' | sed 's/\./-/g' | sed 's/\_/-/g' | cut -c1-32)
  + tag=$(echo $branch_name | sed 's/\//-/g' | sed 's/\./-/g' | sed 's/\_/-/g' | sed -e 's/\(.*\)/\L\1/' | cut -c1-32)
  echo ::set-output name=tag::${tag}
  env:
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  