Update testdox for remaining unit tests

tests/unit/Mapper/ArrayMapperTest.php

@@ -18,6 +18,7 @@ use PHPUnit\Framework\TestCase;
 #[TestDox('Array Mapper (Unit tests)')]
 class ArrayMapperTest extends TestCase
 {
+    #[TestDox('map() succeeds')]
     public function testMapSucceeds(): void
     {
         $result = ['one' => 2, 'three' => 4, 'eight' => 'five'];