Fix typo (#241)

Author: IanDelMar

tests/data/Faker.php

@@ -6,7 +6,7 @@
 
 use function PHPStan\Testing\assertType;
 
-// Boleans
+// Booleans
 assertType('bool', Faker::bool());
 assertType('true', Faker::true());
 assertType('false', Faker::false());