BugFix: automated issue summary posting tagging the wrong user

[zhizhongpu]

In #141 we added a function where GitHub Actions posts an issue summary tagging a user.

There's a bug: the comment posted in the PR thread tags the user who posts the PR, instead of the user who executes the merger / closure. For example, @liaochris merged #141 but @zhizhongpu is tagged in #141 (comment).

Here we fix the bug.

[github-actions]

Summary

In this issue, we:

• WHAT DID YOU DO?

Deliverables:

• WHAT DID YOU BUILD? IN PERMALINK

[Optional] Issue folder is PERMALINK

Last commit in issue branch: 9617ad8

[github-actions]

Summary

In this issue, we:

• fixed a small bug: the comment posted in the PR thread tags the user who posts the PR, instead of the user who executes the merger / closure. For example, @liaochris merged PR for #140 Automating PR reviews using GitHub Actions #141 but @zhizhongpu is tagged in PR for #140 Automating PR reviews using GitHub Actions #141 (comment).

Last commit in issue branch: 9617ad8