Update docs/en/reference/basic-mapping.rst

Co-authored-by: Grégoire Paris <postmaster@greg0ire.fr>

Author: ahmed-bhs

docs/en/reference/basic-mapping.rst

@@ -319,7 +319,7 @@ Mapping PHP Enums
 .. versionadded:: 2.11
 
 Doctrine natively supports mapping PHP backed enums to database columns.
-A backed enum is a PHP enum that has a scalar type (``string`` or ``int``)
+A backed enum is a PHP enum that the same scalar type (``string`` or ``int``)
 assigned to each case. Doctrine stores the scalar value in the database and
 converts it back to the enum instance when hydrating the entity.