chore: Update rubocop requirement from = 1.63.2 to = 1.63.3 (#1026)

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@v1.63.2...v1.63.3)

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

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

appium_lib.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
  s.add_development_dependency 'posix-spawn', '~> 0.3'
  s.add_development_dependency 'pry'
  s.add_development_dependency 'rake', '~> 13.0'
- s.add_development_dependency 'rubocop', '1.63.2'
+ s.add_development_dependency 'rubocop', '1.63.3'
  s.add_development_dependency 'yard', '~> 0.9.11'
  s.add_development_dependency 'minitest', '~> 5.0'
  s.add_development_dependency 'minitest-reporters', '~> 1.1'