[CORE-105] Update auto-approve-broadbot-prs.yml

[samanehsan]

Ticket: https://broadworkbench.atlassian.net/browse/CORE-105

What:
The Github action was skipped when I tested it on a Broadbot PR. Broadbot is actually a Github account, not a bot so I think the problem is with checking the github actor.

---

PR checklist

• I've followed the instructions if I've made any changes to the API, especially if they're breaking changes
• I've filled out the Security Risk Assessment (requires Broad Internal network access) and attached the result to the JIRA ticket

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud