Try fromJson() syntax to convert the sometimes-a-string input to boolean

.github/workflows/multi_publish.yml

@@ -42,9 +42,9 @@ jobs:
         echo "Branches: $JSON_ARRAY" >> "$GITHUB_STEP_SUMMARY"
         echo "\`dry_run\`: ${{ inputs.dry_run }}" >> "$GITHUB_STEP_SUMMARY"
         echo "\`!dry_run\`: ${{ !inputs.dry_run }}" >> "$GITHUB_STEP_SUMMARY"
-        echo "\`!!dry_run\`: ${{ !!inputs.dry_run }}" >> "$GITHUB_STEP_SUMMARY"
         echo "\`dry_run=='true'\`: ${{ inputs.dry_run == 'true' }}" >> "$GITHUB_STEP_SUMMARY"
         echo "\`dry_run=='false'\`: ${{ inputs.dry_run == 'false' }}" >> "$GITHUB_STEP_SUMMARY"
+        echo "\`fromJson(dry_run)\`: ${{ fromJson(inputs.dry_run) }}" >> "$GITHUB_STEP_SUMMARY"
 
   publish_each:
     runs-on: ubuntu-latest