Clarify how to reboot Roomba to generate auto-discovery

[scyto]

Proposed change

Without this key piece of info most people will never experience DHCP auto discovery of their roomba.

Type of change

• Spelling, grammar or other readability improvements (current branch).
• Adjusted missing or incorrect information in the current documentation (current branch).
• Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • I've opened up a PR to add logo's and icons in Brands repository.
• Added documentation for a new feature I'm adding to Home Assistant (next branch).
• Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase: Add support for Roomba 980 discovery core#47696
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue:

Checklist

• This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• The documentation follows the Home Assistant documentation standards.

[scyto]

Should I also add a note that we would like more name / mac address combinations - or just wait until folks log their roomba didn't auto discover via dhcp?

[frenck]

I think this is fine to merge into the current documentation at this point.

Thanks for the PRs @scyto 👍