Update rubocop-performance requirement from 1.21.1 to 1.22.1

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@v1.21.1...v1.22.1)

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

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

Gemfile

@@ -11,5 +11,5 @@ gem "rubocop", "1.66.1"
 gem "rubocop-md", "1.2.2"
 gem "rubocop-minitest", "0.36.0"
 gem "rubocop-packaging", "0.5.2"
-gem "rubocop-performance", "1.21.1"
+gem "rubocop-performance", "1.22.1"
 gem "rubocop-rake", "0.6.0"