doc: add legendecas to collaborators

PR-URL: https://github.com/nodejs/node/pull/30115
Fixes: https://github.com/nodejs/node/issues/30000


Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>