chore(deps-dev): update rubocop-performance requirement from ~> 1.20.…

…1 to ~> 1.21.0 in /helpers/mysql (#919)

chore(deps-dev): update rubocop-performance requirement from ~> 1.20.1 to ~> 1.21.0

Updates the requirements on [rubocop-performance](https://github.com/rubocop/rubocop-performance) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-performance@v1.20.1...v1.21.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ariel Valentin <[email protected]>

helpers/mysql/opentelemetry-helpers-mysql.gemspec

@@ -33,7 +33,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'opentelemetry-test-helpers', '~> 0.3'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rubocop', '~> 1.62'
-  spec.add_development_dependency 'rubocop-performance', '~> 1.20.1'
+  spec.add_development_dependency 'rubocop-performance', '~> 1.21.0'
   spec.add_development_dependency 'simplecov', '~> 0.22.0'
   spec.add_development_dependency 'yard', '~> 0.9'
   spec.add_development_dependency 'yard-doctest', '~> 0.1.6'