According to the repo it is more than just username and repo, the local user account and email address is also tracked [1]. I'd argue that you shouldn't be recording email since that is PII. And repo name and repo owner since the names could be considered trade secrets within organizations. Recording the local user account could be considered sensitive information since it could aid hacking the organization. Finally I don't think you should be recording the GitHub username as well since usage patterns could be analyzed to determine the timezone of the user, which is also considered sensitive personal information in some large corporations that track user behavior data.
Sorry, but I don't think you should request feedback from users without their explicit permission. Isn't there a feedback mechanism built into VSCode already, or make and affordance for one in your plugin UI? Maybe at best generate a random install ID that can be reset for analytics and session tracking? VSCode has guidelines for this, see [2].
[1] https://github.com/watermelontools/wm-extension/blob/c389125...
[2] https://code.visualstudio.com/api/extension-guides/telemetry...