report: use const reference in node_report.cc

PR-URL: #27479
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

src/node_report.cc

@@ -231,7 +231,7 @@ static void WriteNodeReport(Isolate* isolate,
   // Report out the command line.
   if (!node::per_process::cli_options->cmdline.empty()) {
     writer.json_arraystart("commandLine");
-    for (std::string arg : node::per_process::cli_options->cmdline) {
+    for (const std::string& arg : node::per_process::cli_options->cmdline) {
       writer.json_element(arg);
     }
     writer.json_arrayend();