changed the code to an heredoc

.forgejo/workflows/container-build.yml

@@ -5,9 +5,11 @@ jobs:
     runs-on: host
     steps:
       - name: Test OS
-        shell: js
+        shell: sh
         run: |
+          js <<EOF
           console.log(process.env.RUNNER_OS)
+          EOF
       - uses: actions/checkout@v3
       - uses: https://github.com/redhat-actions/buildah-build@v2
         with: