Bump rubocop-rspec from 2.15.0 to 2.17.1

Bumps [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) from 2.15.0 to 2.17.1.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rspec@v2.15.0...v2.17.1)

---
updated-dependencies:
- dependency-name: rubocop-rspec
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -68,7 +68,7 @@ GEM
       rubocop-ast (>= 0.4.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.15.0)
+    rubocop-rspec (2.17.1)
       rubocop (~> 1.33)
     ruby-progressbar (1.13.0)
     simplecov (0.22.0)