Incorrect commit id is added for pytest benchmarks

I am benchmarking with pytest in one repository, and running this workflow from another repository. To get output.json over to the repository using this workflow, I am committing directly to the gh-pages branch. The workflow works very well, but I have noticed that it does not take the commit id from the benchmark output file (which points to which commit the benchmark was ran on), but instead takes the commit id of the commit that added the output.json file in the repository.