Merge branch '5.2' into 5.x

* 5.2:
  Typo
  add a warning about Amazon SES signature

Author: OskarStark

mailer.rst

@@ -174,6 +174,11 @@ party provider:
     For example, the DSN ``ses+smtp://ABC1234:abc+12/345@default`` should be
     configured as ``ses+smtp://ABC1234:abc%2B12%2F345@default``
 
+.. caution::
+
+    Symfony 4.4 only supports Amazon SES Signature Version 3, that has been deprecated.
+    You need to use symfony/amazon-mailer 5.1 or newer.
+
 .. note::
 
     When using SMTP, the default timeout for sending a message before throwing an