chore: only run check pr action on pull_request_target events

[kdheepak]

From the documentation: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target

This event runs in the context of the base of the pull request, rather than in the context of the merge commit, as the pull_request event does. This prevents execution of unsafe code from the head of the pull request that could alter your repository or steal any secrets you use in your workflow. This event allows your workflow to do things like label or comment on pull requests from forks. Avoid using this event if you need to build or run code from the pull request.

[codecov]

Codecov Report

Merging #485 (69b2302) into main (322e46f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #485   +/-   ##
=======================================
  Coverage   90.16%   90.16%           
=======================================
  Files          41       41           
  Lines       11277    11277           
=======================================
  Hits        10168    10168           
  Misses       1109     1109