Update data-flow-aggregate.md

Author: kromerm

articles/data-factory/data-flow-aggregate.md

@@ -43,9 +43,9 @@ Aggregate transformations are closely equivalent to SQL aggregate select queries
 
 ![Aggregate data flow script](media/data-flow/aggdfs1.png "Aggregate data flow script")
 
-```MoviesYear```: Derived Column defining year and title columns
-```AvgComedyRatingByYear```: Aggregate transformation for average rating of comedies grouped by year
-```avgrating```: Name of new column being created to hold the aggregated value
+* ```MoviesYear```: Derived Column defining year and title columns
+* ```AvgComedyRatingByYear```: Aggregate transformation for average rating of comedies grouped by year
+* ```avgrating```: Name of new column being created to hold the aggregated value
 
 ```
 MoviesYear aggregate(groupBy(year),