gems: update opentelemetry-instrumentation-rack requirement from ~> 0.22.0 to >= 0.22, < 0.28

Updates the requirements on [opentelemetry-instrumentation-rack](https://github.com/open-telemetry/opentelemetry-ruby-contrib) to permit the latest version.
- [Release notes](https://github.com/open-telemetry/opentelemetry-ruby-contrib/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-ruby-contrib/blob/main/instrumentation/rack/CHANGELOG.md)
- [Commits](https://github.com/open-telemetry/opentelemetry-ruby-contrib/compare/opentelemetry-instrumentation-rack/v0.22.0...opentelemetry-instrumentation-rack/v0.25.0)

---
updated-dependencies:
- dependency-name: opentelemetry-instrumentation-rack
  dependency-version: 0.25.0
  dependency-type: direct:production
...

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

dyndnsd.gemspec

@@ -33,7 +33,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'logger', '>= 1.6', '< 1.8'
   s.add_dependency 'metriks'
   s.add_dependency 'opentelemetry-exporter-jaeger', '~> 0.22.0'
-  s.add_dependency 'opentelemetry-instrumentation-rack', '~> 0.22.0'
+  s.add_dependency 'opentelemetry-instrumentation-rack', '>= 0.22', '< 0.28'
   s.add_dependency 'opentelemetry-sdk', '~> 1.2.0'
   s.add_dependency 'rack', '~> 3.0'
   s.add_dependency 'rackup', '~> 2'