Allow turbo-rails 2 in gemspec (#3671)

Author: bb

rails_admin.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'kaminari', '>= 0.14', '< 2.0'
   spec.add_dependency 'nested_form', '~> 0.3'
   spec.add_dependency 'rails', ['>= 6.0', '< 8']
-  spec.add_dependency 'turbo-rails', '~> 1.0'
+  spec.add_dependency 'turbo-rails', ['>= 1.0', '< 3']
   spec.add_development_dependency 'bundler', '>= 1.0'
   spec.authors = ['Erik Michaels-Ober', 'Bogdan Gaza', 'Petteri Kaapa', 'Benoit Benezech', 'Mitsuhiro Shibuya']
   spec.description = 'RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data.'