Cap required_ruby_version at Ruby 4.0

This gem ships native binaries through Ruby 4.0, so restrict installs to < 4.1.dev
until we add 4.1 builds and CI coverage.

Author: joemsak

code_ownership.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
           'public gem pushes.'
   end
 
-  spec.required_ruby_version = Gem::Requirement.new('>= 3.2', '< 5')
+  spec.required_ruby_version = Gem::Requirement.new('>= 3.2', '< 4.1.dev')
 
   # https://guides.rubygems.org/make-your-own-gem/#adding-an-executable
   # and