Relax faraday-gzip upper bound for Ruby 4.0 compatibility

Remove < 3.0 constraint on faraday-gzip since faraday-gzip < 3.0
enforces Ruby < 4, blocking installation on Ruby 4.0+.

See upstream PR: JsonApiClient#416

Author: Bernardo

json_api_client.gemspec

@@ -13,7 +13,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "activesupport", '>= 6.0.0'
   s.add_dependency "faraday", '>= 1.10', '< 3.0'
-  s.add_dependency "faraday-gzip", '>= 1.0', '< 3.0'
+  s.add_dependency "faraday-gzip", '>= 1.0'
   s.add_dependency "addressable", '~> 2.2'
   s.add_dependency "activemodel", '>= 6.0.0'
   s.add_dependency "rack", '>= 0.2'