add the new jitter option to the XML schema definition

Author: xabbuh

src/Symfony/Bundle/FrameworkBundle/Resources/config/schema/symfony-1.0.xsd

@@ -609,6 +609,7 @@
         <xsd:attribute name="delay" type="xsd:integer" />
         <xsd:attribute name="multiplier" type="xsd:float" />
         <xsd:attribute name="max-delay" type="xsd:float" />
+        <xsd:attribute name="jitter" type="xsd:float" />
     </xsd:complexType>
 
     <xsd:complexType name="messenger_bus">