Update rubocop requirement from 1.81.6 to 1.81.7 (#609)

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.81.6...v1.81.7)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.81.7
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile

@@ -15,7 +15,7 @@ gem 'appraisal'
 gem 'overcommit', '0.68.0'
 
 # Pin tool versions (which are executed by Overcommit) for CI builds
-gem 'rubocop', '1.81.6'
+gem 'rubocop', '1.81.7'
 gem 'rubocop-performance', '1.26.1'
 
 gem 'simplecov', '~> 0.22.0'