Update reference/configuration/framework.rst

Co-authored-by: Oskar Stark <oskarstark@googlemail.com>

Author: l-vo

reference/configuration/framework.rst

@@ -2995,7 +2995,8 @@ headers
 
 **type**: ``array``
 
-Headers to add to emails. key (`name` attribute in xml format) is the header name and value the header value.
+Headers to add to emails. key (``name`` attribute in xml format)
+is the header name and value the header value.
 
 workflows
 ~~~~~~~~~