modify file upload

entrypoint.sh

@@ -35,7 +35,11 @@ mkdir sboms
 # give the output SBOM a traceable name
 timestamp=$(date +"%Y-%m-%d_%H-%M-%S")
 workflowid=$GITHUB_RUN_ID
-out_file="sboms/inspector-scan-sbom_$workflowid_$timestamp.json"
+out_file="sboms/inspector-scan-sbom_"
+out_file+=$workflowid
+out_file+=_
+out_file+=$timestamp
+out_file+=.json
 echo "Out file $out_file"
 
 $sbomgen $artifact_type $artifact_path_arg $artifact_path $prog --scan-sbom -o $out_file