On July 2nd, 2020 at 15:33 (UTC) your personal access token (Pages 2 Repo Chrome Extension) was used as part of a query parameter to access an endpoint through the GitHub API:
Please use the Authorization HTTP header instead, as using the access_token query parameter is deprecated. If this token is being used by an app you don't have control over, be aware that it may stop working as a result of this deprecation.
From Github: