rename a test

Author: gomain

exercises/chapter6/test/Main.purs

@@ -207,7 +207,7 @@ Note to reader: Delete this line to expand comment block -}
           test "Multiply Array Int append" do
             Assert.equal (act m1 (act m2 a))
               $ act (m1 <> m2) a
-          test "Multiply Array Int concrete" do
+          test "Multiply Array Int acts on elements" do
             Assert.equal (map (act m1) a)
               $ act m1 a
         suite "Multiply Array String" do