change readme example

README.md

@@ -187,8 +187,8 @@ render("{% include \"footer.html\" %}", data);
 If a corresponding template could not be found in the file system, the *include callback* is called:
 ```.cpp
 // The callback takes the current path and the wanted include name and returns a template
-env.set_include_callback([&env](const std::string& path, const std::string& name) {
-  return env.parse("Hello {{ name }} from " + name);
+env.set_include_callback([&env](const std::string& path, const std::string& template_name) {
+  return env.parse("Hello {{ neighbour }} from " + template_name);
 });
 
 // You can disable to search for templates in the file system via