change elasticsearch dependency to opensearch

Author: rdsun0301

elasticsearch-model/elasticsearch-model.gemspec

@@ -42,7 +42,7 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 2.4'
 
   s.add_dependency 'activesupport', '> 3'
-  s.add_dependency 'elasticsearch', '~> 7'
+  s.add_dependency 'opensearch-ruby', '~> 1'
   s.add_dependency 'hashie'
 
   s.add_development_dependency 'activemodel', '> 3'