Clarify nomenclature of `access_grants`

[dteycheney]

Environment

• Python version: 3.8.10
• Nautobot version: 1.1.2
• nautobot-chatops version: 1.5.0

Steps to Reproduce

1. Read the documentation on this page - https://github.com/nautobot/nautobot-plugin-chatops/blob/develop/docs/chat_setup/chat_setup.md#grant-access-to-the-chatbot
2. Attempt to create some access grants for Cisco Webex Teams

Expected Behavior

I expected to glean from the documentation on how to set this up using Webex Teams constructs.

For example, Webex uses the term room instead of the Slack specific term channel. I'd suggest perhaps having a translation table which shows the correlation between the different nomenclature.

Observed Behavior

Not applicable.

[dteycheney]

FYI @tim-fiola