Bump VERSION to 1.10.1

• Diff: https://gitlab.com/gitlab-org/gitlab-triage/compare/v1.10.0...a025eb1

• Release notes:

### Fixes

- !166 Don't use `String#delete_suffix` since it's only available in Ruby 2.5+.

• Checklist before merging:

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

• Checklist after merging:

  • Update the release notes for the newly created tag.