Release version 1.11.1

• Diff: https://gitlab.com/gitlab-org/gitlab-triage/compare/v1.11.0...ad0838552ba8cfed06b91804cae24b4f18ed542e

• Release notes:

### Fixes

- !174 Fix label checks when there's a space in the name
- !175 Use `%20` instead of `+` in the URL

### Other changes (tooling, technical debt)

- !171 Make Resources classes inherit from SimpleDelegator

• 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.