Deal with more fixme

src/Umbraco.Web/Scheduling/IBackgroundTaskRunner.cs

@@ -15,6 +15,6 @@ namespace Umbraco.Web.Scheduling
         void Add(T task);
         bool TryAdd(T task);
 
-        // fixme - complete the interface?
+        // todo - complete the interface?
     }
 }

src/Umbraco.Web/Scheduling/ScheduledPublishing.cs

@@ -56,7 +56,7 @@ namespace Umbraco.Web.Scheduling
                 // ensure we run with an UmbracoContext, because this may run in a background task,
                 // yet developers may be using the 'current' UmbracoContext in the event handlers
                 //
-                // fixme
+                // todo
                 // - or maybe not, CacheRefresherComponent already ensures a context when handling events
                 // - UmbracoContext 'current' needs to be refactored and cleaned up
                 // - batched messenger should not depend on a current HttpContext