minor symfony#12004 Class name is wrong according to the other examples (OskarStark)

OskarStark · OskarStark · commit 4f163771177c · 2019-07-23T08:21:31.000+02:00
This PR was merged into the 4.3 branch. Discussion ---------- Class name is wrong according to the other examples  Commits ------- f6906e0 Class name is wrong according to the other examples
diff --git a/service_container/alias_private.rst b/service_container/alias_private.rst
@@ -157,7 +157,7 @@ or you decided not to maintain it anymore), you can deprecate its definition:
     .. code-block:: yaml
 
         app.mailer:
-            alias: '@AppBundle\Mail\PhpMailer'
+            alias: '@App\Mail\PhpMailer'
 
             # this will display a generic deprecation message...
             deprecated: true
