ci: bump actions/checkout to v4

[dizer-ti]

Hey ! GitHub‑hosted runners now use Node 20, so checkout v4 is required
This PR updates all workflows to actions/checkout@v4 , no functional changes expected

[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: checkout‑bot.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email email@example.com
3. Make sure that the git commit email is configured in your GitHub account settings, see https://github.com/settings/emails

[cla-bot]

We require contributors/corporates @dizer-ti to read our Contributor License Agreement, please check the Individual CLA document/Corporate CLA document

[dizer-ti]

I have read the CLA Document, and I hereby agree to its terms.

[cla-bot]

We require contributors/corporates @dizer-ti to read our Contributor License Agreement, please check the Individual CLA document/Corporate CLA document

[dizer-ti]

I have read the CLA Document, and I hereby agree to its terms.

[dizer-ti]

Hey ! rickb80
Сould you review my PR when you have time?
Thanks