Bump rubocop from 1.75.8 to 1.76.1

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.75.8 to 1.76.1.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.75.8...v1.76.1)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.76.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -24,7 +24,7 @@ gem 'rake', '~> 13.2'
 gem 'activerecord', '~> 7.2' 
 gem 'otr-activerecord', '~> 2.5.0'
 gem 'sqlite3', '~> 2.7'
-gem 'rubocop', '~> 1.75.8', require: false
+gem 'rubocop', '~> 1.76.1', require: false
 
 # Geolocation support
 group :geoip do