fix Emoji documentation URL

Author: xabbuh

src/Symfony/Component/Emoji/README.md

@@ -11,7 +11,7 @@ If you have the zlib extension enabled, you can compress the data by running:
 Resources
 ---------
 
- * [Documentation](https://symfony.com/doc/current/components/emoji.html)
+ * [Documentation](https://symfony.com/doc/current/emoji.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)