[ruby/json] use . over :: for consistency

ruby/json@f5c1b8c45d

Author: GrantBirki

ext/json/lib/json/common.rb

@@ -1072,7 +1072,7 @@ def j(*objs)
     end
 
     objs.each do |obj|
-      puts JSON::generate(obj, :allow_nan => true, :max_nesting => false)
+      puts JSON.generate(obj, :allow_nan => true, :max_nesting => false)
     end
     nil
   end
@@ -1087,7 +1087,7 @@ def jj(*objs)
     end
 
     objs.each do |obj|
-      puts JSON::pretty_generate(obj, :allow_nan => true, :max_nesting => false)
+      puts JSON.pretty_generate(obj, :allow_nan => true, :max_nesting => false)
     end
     nil
   end