Makes DOCtor-RST happy

Error: You are not allowed to use version "3.6.0". Only major version "5" is allowed.
Error: Please only provide ".. versionadded::" if the version is greater/equal "5.0"

Author: noniagriconomie

logging/monolog_email.rst

@@ -4,7 +4,7 @@
 How to Configure Monolog to Email Errors
 ========================================
 
-.. versionadded:: 3.6.0
+.. versionadded:: 3.6
 
     Support for emailing errors using :doc:`Symfony mailer </mailer>` was added in MonologBundle 3.6.0.