Update rubocop requirement from ~> 1.62.1 to ~> 1.63.4

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.

Updates `rubocop` to 1.63.4
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.62.1...v1.63.4)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-type: direct:development
  dependency-group: rubocop-dependencies
...

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

Gemfile

@@ -14,7 +14,7 @@ end
 group(:development) do
   gem('debug', '~> 1.9.2', require: false)
   gem('benchmark-ips', '~> 2.13.0', require: false)
-  gem('rubocop', '~> 1.62.1', require: false)
+  gem('rubocop', '~> 1.63.4', require: false)
   gem('rubocop-rake', '~> 0.6.0', require: false)
   gem('rubocop-performance', '~> 1.21.0', require: false)
   gem('rubocop-thread_safety', '~> 0.5.1', require: false)