Rename Data Flex to DataFlex

Author: Richienb

d/Data Flex renamed to d/DataFlex

@@ -244,7 +244,7 @@ Make sure to see [contributing.md](/contributing.md) for instructions on contrib
 * [dark](d/dark.txt)
 * [Dart](d/Dart.dart)
 * [Darwin](d/Darwin.drw)
-* [Data Flex](d/Data%20Flex)
+* [DataFlex](d/DataFlex)
 * [db2](d/db2.sql)
 * [dBase](d/dBase.dbf)
 * [Dc](d/Dc.dc)