Indicate who is triggering the /lead ping cmd

[Lewdcario]

It's unclear who runs the command which can lead to abuse, this fixes that.

• [x] - There are no unrelated changes
• [x] - Running yarn test does not throw any errors
• [x] - I ran yarn lint to make sure my codebase is consistent
• [x] - I link to the relevant issues to be closed, if applicable