fix: upgrade deprecated GitHub Actions to v4#105
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actions/cache v2 and actions/checkout v2 have been sunset by GitHub, causing all CI jobs to fail immediately during setup. This upgrades both to v4 and fixes the deprecated ::set-output syntax in the dialyzer job to use $GITHUB_OUTPUT instead.
ubuntu-latest now resolves to Ubuntu 24.04, which requires OTP 24.3+. The previous erlef/setup-beam@v1.15 also didn't recognize ubuntu24 as a valid ImageOS. Upgrade to erlef/setup-beam@v1 (latest) and bump OTP from 24.2.1 to 24.3 to satisfy the Ubuntu 24.04 compatibility matrix.
burden
approved these changes
Apr 8, 2026
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Summary
actions/checkoutfrom v2 to v4 inci.ymlanddeploy.ymlactions/cachefrom v2 to v4 inci.yml::set-outputsyntax with$GITHUB_OUTPUTin the dialyzer jobGitHub has sunset
actions/cachev1/v2 andactions/checkoutv2, causing both CI jobs (Build and testandRun Dialyzer for type checking) to fail immediately during job setup with:See: https://github.blog/changelog/2024-12-05-notice-of-upcoming-releases-and-breaking-changes-for-github-actions/
Test plan
Build and testandRun Dialyzer for type checkingjobs)