report: loop over uv_cpu_info() results

The code currently loops over the results, but only the
first result is accessed.

PR-URL: https://github.com/nodejs/node/pull/28829


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>