update actions/checkout from v3 to v4 #35
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Updates all instances of actions/checkout@v3 to actions/checkout@v4
This is the last file requiring this update, all other files have been updated
Reference:
Latest version confirmation: https://github.com/actions/checkout/releases/tag/v4.2.2
This update ensures we're using the most recent stable version of the GitHub checkout action across our CI/CD pipelines.