Bump rubocop from 1.71.2 to 1.75.8

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.71.2 to 1.75.8.
- [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/v1.71.2...v1.75.8)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.75.8
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Notes:

This commit also includes several style and lint fixes required after
updating RuboCop:

- Removed redundant parentheses now detected by improved
  'Style/RedundantParentheses' (1.72 and 1.75.3).
- Replaced ternary expressions with logical OR when the ternary was
  returning 'true', as flagged by 'Style/RedundantCondition' (1.73).
- Adjusted block variables to resolve new 'Lint/ShadowingOuterLocalVariable'
  offenses (1.75), helping avoid future conflicts during upgrades with
  'rails app:updates'

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

Gemfile

@@ -100,7 +100,7 @@ group :development do
   gem "pronto-eslint", "~> 0.11.1", require: false
   gem "pronto-rubocop", "~> 0.11.6", require: false
   gem "pronto-stylelint", "~> 0.11.1", require: false
-  gem "rubocop", "~> 1.71.2", require: false
+  gem "rubocop", "~> 1.76.1", require: false
   gem "rubocop-capybara", "~> 2.21.0", require: false
   gem "rubocop-factory_bot", "~> 2.26.1", require: false
   gem "rubocop-performance", "~> 1.23.1", require: false