Move versionadded upper & add note about dev env

Author: jmsche

translation.rst

@@ -1292,6 +1292,14 @@ adapted to the format required by GitHub, but you can force that format too:
 Pseudo-localization translator
 ------------------------------
 
+.. versionadded:: 5.2
+
+    The pseudolocalization translator was introduced in Symfony 5.2.
+
+.. note::
+
+    The pseudolocalization translator is meant to be used for development only.
+
 The following image shows the main menu of the interface of a popular Internet
 service:
 
@@ -1411,10 +1419,6 @@ And this is the same page with pseudolocalization enabled:
 
 .. image:: /_images/translation/pseudolocalization-symfony-demo-enabled.png
 
-.. versionadded:: 5.2
-
-        The pseudolocalization translator was introduced in Symfony 5.2.
-
 Summary
 -------