Merge branch '5.1' into 5.2

* 5.1:
  Add missing entries in .gitattributes
  Update README.md

Author: fabpot

README.md

@@ -11,7 +11,7 @@ are not covered by Symfony's
 Resources
 ---------
 
-  * [Documentation](https://symfony.com/doc/current/components/notifier.html)
+  * [Documentation](https://symfony.com/doc/current/notifier.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)