message: docs: add missing user-testing team changes
diff: @@ -54,10 +54,11 @@ please read our [Getting Involved / Onboarding](GETTING_INVOLVED.md) document.
  | @Rita Serra | | Design | UTC-0 (+1) |
  | You? | | | |
  -### User Testing / QA
  +### User Testing / QA (`#team-user-testing`)
  | Slack | GitHub Handle | Role | Timezone (DST) |
  |----------------------|--------------------------------------------------------|-------------|----------------|
  +| @Dan Benamy | [@dbenamy](https://github.com/dbenamy) | Lead | UTC+4 (+5) |
  | You? | | | |
  ### Marketing / PR (`#team-marketing`)
  