Correct FlatTableProjection being called FlatFileProjection

docs/events/projections/flat.md

@@ -161,9 +161,9 @@ public class FlatImportProjection: FlatTableProjection
 
 A couple notes on this version of the code:
 
-* `FlatFileProjection` is adding columns to its table based on the designated column mappings. 
-  You can happily customize the `FlatFileProjection.Table` object to add indexes, constraints, or defaults.
-* Marten is able to apply schema migrations and manage the table from the `FlatFileProjection` as long as it’s registered with Marten.
+* `FlatTableProjection` is adding columns to its table based on the designated column mappings. 
+  You can happily customize the `FlatTableProjection.Table` object to add indexes, constraints, or defaults.
+* Marten is able to apply schema migrations and manage the table from the `FlatTableProjection` as long as it’s registered with Marten.
 * When you call `Map(x => x.ActivityType)`, Marten is by default mapping that to a snake_cased derivation of the member 
   name for the column, so “activity_type”. You can explicitly map the column name yourself.
 * The call to `Map(expression)` chains a fluent builder for the table column if you want to further customize the table