To be more specific, you can see Dependabot as an anlog of CompatHelper for GitHub actions dependencies such as actions/checkout@v2. Based on semver, you will not use actions/checkout@v2 with this setup. Dependabot will create a PR updating such a line to actions/checkout@v3. This will fix deprecation warnings such as
Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16:
actions/checkout@v2, actions/cache@v2, codecov/codecov-action@v2.
For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.
That’s handled by updating the GitHub actions mentioned there to there new major version - which dependabot will do for you by submitting PRs. See also enable dependabot for GitHub actions by ranocha · Pull Request #42 · JuliaArrays/TiledIteration.jl · GitHub