[Clock] fix url in README.md

Author: EJTJ3

README.md

@@ -40,7 +40,7 @@ $service->doSomething();
 Resources
 ---------
 
- * [Documentation](https://symfony.com/doc/current/clock.html)
+ * [Documentation](https://symfony.com/doc/current/components/clock.html)
  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
  * [Report issues](https://github.com/symfony/symfony/issues) and
    [send Pull Requests](https://github.com/symfony/symfony/pulls)