DeleteFile action results in 404 when file exists #371

Describe the bug
I am using the deleteFile action in one of my pipelines, the idea is to perform some cleanup after some tasks are successfully done. I am following the documentation of the method, I put all the required fields, but when is running I get a 404, file does not exist, even though the file is there. Is there something I am missing? when deleting using curl(same parameters) it works just fine. Unfortunately I can't share screenshots since is a private repo.

To Reproduce
Steps to reproduce the behavior:
I get the sha of the file I want to delete:

const file = await github.rest.repos.getContent({
                owner: context.repo.owner,
                repo: context.repo.repo,
                path: "${{ path1 }}/${{ path2 }}/file",
                ref: "my_branch"

and then I run the delete:

github.rest.repos.deleteFile({
                 owner: context.repo.owner,
                 repo: context.repo.repo,
                 path: "${{ path1 }}/${{ path2 }}/file",
                 message: "Delete file",
                 sha: file.data.sha,
                 branch: "my_branch"

Expected behavior
File is deleted on the specific branch.

Desktop (please complete the following information):

• OS: Ubuntu

Additional context
I am using version 6.4