[skip ci] try job summary for multinode periodic

Author: elelaysh

.github/workflows/stackhpc-multinode-periodic.yml

@@ -7,6 +7,7 @@ name: Multinode periodic
   schedule:
     # Runs nightly at 2:42 AM.
     - cron: "42 2 * * *"
+  workflow_dispatch:
 jobs:
   generate-inputs:
     name: Generate inputs
@@ -31,7 +32,10 @@ jobs:
 
       - name: Display generated inputs
         run: |
-          echo '${{ toJSON(steps.generate-inputs.outputs) }}'
+          echo '## generated inputs:' > "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
+          echo '${{ toJSON(steps.generate-inputs.outputs) }}' | tee -a "$GITHUB_STEP_SUMMARY"
+          echo '```' >> "$GITHUB_STEP_SUMMARY"
   multinode:
     name: Multinode periodic
     needs: