So just a while ago I got this notification here on Phab:
The problem is simple enough: I did not commit rWDQG45258c8c39603d8a45ebfc2df7730567efccab9b or have anything to do with it, despite somehow being listed as the "author" of the commit in question (?!). Looking at the linked GitHub pull request, it was largely done by dependabot with very little to no human interaction.
The GitHub contributors page for the wikidata-query-gui repository lists all the people who've ever contributed to the repo and have a GitHub account; though I have a GitHub account, I'm not listed as I've never committed to this repo.
So, uh, not quite sure what's going on here but I'd appreciate if someone could take a look at this.