build(deps): bump @octokit/core from 2.5.3 to 2.5.4

Bumps [@octokit/core](https://github.com/octokit/core.js) from 2.5.3 to 2.5.4.
- [Release notes](https://github.com/octokit/core.js/releases)
- [Commits](octokit/core.js@v2.5.3...v2.5.4)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>