change recorder parm name to reflect its real purpose

[sdetweil]

Description

new speech service for sharing the mic had parm which was unclear on its use.

Checklist

• [x] I have read and understand the CONTRIBUTIONS.md file
• [x] I have searched for and linked related issues
• [x] I have added config.schema.json file if config option are required.
• [x] I am NOT targeting master branch