[ruby/prism] Remove deprecated #child usage

https://github.com/ruby/prism/commit/14d9b431e2

lib/prism/translation/ripper.rb

@@ -1488,16 +1488,16 @@ module Prism
       # Visit a constant path that is part of a write node.
       private def visit_constant_path_write_node_target(node)
         if node.parent.nil?
-          bounds(node.child.location)
+          bounds(node.name_loc)
-          child = on_const(node.child.name.to_s)
+          child = on_const(node.name.to_s)
 
           bounds(node.location)
           on_top_const_field(child)
         else
           parent = visit(node.parent)
 
-          bounds(node.child.location)
+          bounds(node.name_loc)
-          child = on_const(node.child.name.to_s)
+          child = on_const(node.name.to_s)
 
           bounds(node.location)
           on_const_path_field(parent, child)