Update dnsimple requirement from >= 4.4, < 8.9 to >= 4.4, < 9.1

Updates the requirements on [dnsimple](https://github.com/dnsimple/dnsimple-ruby) to permit the latest version.
- [Changelog](https://github.com/dnsimple/dnsimple-ruby/blob/main/CHANGELOG.md)
- [Commits](dnsimple/dnsimple-ruby@v4.4.0...v9.0.0)

---
updated-dependencies:
- dependency-name: dnsimple
  dependency-type: direct:production
...

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

record_store.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'ejson'
   spec.add_runtime_dependency 'thor', '>= 0.20.3', '< 1.4.0'
 
-  spec.add_runtime_dependency 'dnsimple', '>= 4.4', '< 8.9'
+  spec.add_runtime_dependency 'dnsimple', '>= 4.4', '< 9.1'
   spec.add_runtime_dependency 'fog-dynect', '>= 0.4', '< 0.6'
   spec.add_runtime_dependency 'fog-json'
   spec.add_runtime_dependency 'fog-xml'