Bug: Fix GitHub Action race condition when opening PRs

[yvesgurcan]

Environment

• Version of web-midi-player: 1.2.3
• Browser: N/A

Bug

Describe the issue as specifically as possible.

When a user opens a PR, more than often some sort of race condition occurs where the GitHub Action triggers successfully but then triggers again and stay stuck.

Expected behavior

What did you expect to happen?

The GitHub Action should resolve successfully instead of being stuck. The Action makes a commit to the branch, which is the source of the problem. We need a way to commit new code to the PR without getting stuck.