docs(ajs-quick-reference): Add missing monospaced typeface for variable name (#3339)

Author: AlexanderLukin

public/docs/ts/latest/cookbook/ajs-quick-reference.jade

@@ -600,7 +600,7 @@ table(width="100%")
         <tr ng-repeat="movie in movieList | orderBy : 'title'">
       :marked
         Displays the collection in the order specified by the expression.
-        In this example, the movie title orders the movieList.
+        In this example, the movie title orders the `movieList`.
     td
       :marked
         ### none