Fix assignment on editing github issue PR description

[rndquu]

There's this issue which was initially assigned to Keyrxng.

What happened:

1. I edited this PR comment
2. ubiquity-os-beta suddenly assigned me to the issue while the expected behavior was to keep Keyrxng as the original assignee

P.S. Not sure what's the correct repository for this issue, https://github.com/ubiquity-os-marketplace/command-start-stop or https://github.com/ubiquity-os-marketplace/daemon-disqualifier

[0x4007]

Looks like the logic to capture the closing keywords also works on edits. I suppose that it should check if it is currently assigned, and if so, to not clobber assignment.