Notably, this gets us `@actions/github` 6.0.1, which is necessary for
`github.context.runAttempt` (so I have also updated `package.json`
accordingly). On that note... great job following semver, GitHub!
Between this and the non-breaking major version change on
`@actions/cache`, I'm starting to feel like nobody on the Actions team
understands how software versioning works.