Bump version to 6.10.1

• Diff: https://gitlab.com/gitlab-org/gitlab-qa/compare/v6.10.0...7edf08f8

• Release notes:

### Fixes

- !574 Improve regex to detect stacktraces in qa failure issues and mention the job URL when creating failure issues
- !580 Ensure testcases in quarantine still have their labels updated
- !584 Fix spec that expected non-master commit ref

• Checklist before merging:

  • Diff link is up-to-date.
  • Based on the diff, lib/gitlab/qa/version.rb is updated, according to SemVer.
  • Release notes are accurate.

• Checklist after merging:

  • Create a tag for the new release version.