readme: update link

README.md

@@ -141,7 +141,7 @@ You can pass `g-recaptcha` the following properties:
 - `skip`*
 
 Their meaning is described on [this official doc](https://developers.google.com/recaptcha/docs/display#render_param).
-Also have a look at the dummy app's [example templates](https://github.com/algonauti/ember-g-recaptcha/tree/master/tests/dummy/app/templates).
+Also have a look at the dummy app's [example templates](https://github.com/algonauti/ember-g-recaptcha/tree/main/tests/dummy/app/templates).
 
 \* The `skip` option is not a official option.