doc: changed "considered experimental" to "experimental" in cli.md

Change "no longer considered experimental" to "no longer experimental"
in cli.md.

PR-URL: https://github.com/nodejs/node/pull/34128


Reviewed-By: Denys Otrishko <shishugi@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>