[#5829] Change highlighting language

Author: wouterj

cookbook/security/_ircmaxwell_password-compat.rst.inc

@@ -3,6 +3,6 @@
     If you're using PHP 5.4 or lower, you'll need to install the ``ircmaxell/password-compat``
     library via Composer in order to be able to use the ``bcrypt`` encoder:
 
-    .. code-block:: json
+    .. code-block:: bash
 
         $ require ircmaxell/password-compat "~1.0"