Added cache_busting to default asset config

Author: GeertDD

reference/configuration/assetic.rst

@@ -48,6 +48,9 @@ Full default Configuration
 
                 # An array of named filters (e.g. some_filter, some_other_filter)
                 some_filter:                 []
+            workers:
+                cache_busting:
+                    enabled:              false
             twig:
                 functions:
                     # An array of named functions (e.g. some_function, some_other_function)