I think the top one might be the culprit. But it might be the guy's account was hacked?
On his repo he has a fork of WSL and the repo is called "free-palestine", he tried to merge the branch "freedom". So that PR seems likely to be linked to this. Other than this, activity seems normal for a terminal githubber with 444 repos...
If you watch the PRs history, you can see that the user github-actions edited them. This user is the default one when a GitHub Action (the pipeline OP refers to) alters the repo. So someone probably submitted a pull request abusing the GitHub token when the Action ran on their PR.