Friendly reminder to update Node.js version

[trinitronx]

Hello,

First of all: Thank you for this excellent GitHub Action!

I noticed a deprecation warning in a repo that uses this action at latest git SHA:

Annotations

1 warning

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[!WARNING] The following actions uses Node.js version which is deprecated and will be forced to run on node20: yanamura/git-flow-merge-action@9d4a90b72af5df91efa8db230273c95f57dd8d05. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

• automerge

Please consider this a friendly reminder to update the version of Node.js this action uses.

It appears simple to do, according to the documentation here. Simply change the action.yml runs.using to 'node20':

runs:
  using: 'node20'
  main: 'dist/index.js'

I will make a pull request to help resolve this issue. If you'd be so kind as to consider it. Thank you! 🙏