ISSUE-80: Update erroneous `jsUrl` value in README usage documentation
ISSUE-80: Update erroneous `jsUrl` value in README usage documentation

* Remove `?render=explicit` from `jsUrl` examples in README.md b/c it is always appended in the component `_initialize` action
* Fixes error (`Uncaught Error: Missing required parameters: sitekey`) observed when configuring according to README.md

algonauti/ember-g-recaptcha,algonauti/ember-g-recaptcha