chore(deps-dev): update rake-compiler-dock requirement from ~> 1.5.0 …

…to ~> 1.6.0

Updates the requirements on [rake-compiler-dock](https://github.com/rake-compiler/rake-compiler-dock) to permit the latest version.
- [Release notes](https://github.com/rake-compiler/rake-compiler-dock/releases)
- [Changelog](https://github.com/rake-compiler/rake-compiler-dock/blob/main/History.md)
- [Commits](rake-compiler/rake-compiler-dock@v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: rake-compiler-dock
  dependency-type: direct:development
...

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

y-rb.gemspec

@@ -40,7 +40,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "rb_sys", "~> 0.9.86"
 
   spec.add_development_dependency "rake-compiler", "~> 1.2.1"
-  spec.add_development_dependency "rake-compiler-dock", "~> 1.5.0"
+  spec.add_development_dependency "rake-compiler-dock", "~> 1.6.0"
 
   spec.extensions = ["ext/yrb/extconf.rb"]
 end