Merge branch '4.4' into 5.1

* 4.4:
  4.0->master: Updated link+title of Heroku's doc
  [5.0] [security] formatting

Author: javiereguiluz

deployment/heroku.rst

@@ -7,6 +7,6 @@ Deploying to Heroku
 ===================
 
 To deploy to Heroku, see their official documentation:
-`Deploying Symfony 4 Apps on Heroku`_.
+`Deploying Symfony 4 & 5 Apps on Heroku`_.
 
-.. _`Deploying Symfony 4 Apps on Heroku`: https://devcenter.heroku.com/articles/deploying-symfony4
+.. _`Deploying Symfony 4 & 5 Apps on Heroku`: https://devcenter.heroku.com/articles/deploying-symfony4