Bump @actions/core from 2.0.2 to 3.0.0 (#101)

* Bump @actions/core from 2.0.2 to 3.0.0

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 2.0.2 to 3.0.0.
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/core/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/core)

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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Rickard Andersson <dunklas@gmail.com>

Author: dependabot[bot]