Update benchmark-ips requirement from ~> 2.12.0 to ~> 2.13.0 (#460)

Updates the requirements on [benchmark-ips](https://github.com/evanphx/benchmark-ips) to permit the latest version.
- [Release notes](https://github.com/evanphx/benchmark-ips/releases)
- [Changelog](https://github.com/evanphx/benchmark-ips/blob/master/History.md)
- [Commits](evanphx/benchmark-ips@v2.12.0...v2.13.0)

---
updated-dependencies:
- dependency-name: benchmark-ips
  dependency-type: direct:development
...

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

Gemfile

@@ -14,7 +14,7 @@ group(:development) do
   gem('debug', '~> 1.8.0', require: false)
   gem('rbs', '~> 3.3.2', require: false)
   gem('steep', '~> 1.6.0', require: false)
-  gem('benchmark-ips', '~> 2.12.0', require: false)
+  gem('benchmark-ips', '~> 2.13.0', require: false)
   gem('stackprof')
   gem('yard', '~> 0.9.34', require: false)
   gem('rubocop', '~> 1.58.0', require: false)