Fix Markdown.

wiki/src/blueprint/monthly_report.mdwn

@@ -59,7 +59,7 @@ Publishing
           Reply-to: tails-project@boum.org
 
   - Make sure that we already have a volunteer for next month, or
-    otherwise raise the issue on tails-project@boum.org and update the
+    otherwise raise the issue on <tails-project@boum.org> and update the
     [[list of volunteers|monthly_report#coordinators]].
 
 Template