Bug (typo+) in softDeletable doc

[siciarek]

In README.md in softDeletable sample there is:

// get id
$id = $em->getId();

// now remove it
$em->remove($category);

// hey, i'm still here:
$category = $em->getRepository('Category')->findOneById($id);

// but i'm "deleted"
$category->isDeleted(); // === true

It does not work ;-(
My fix proposal:

// get id
$id = $category->getId();  // <---------------------- CHANGED

// now remove it
$em->remove($category);
$em->flush(); // <---------------------- ADDED

// hey, i'm still here:
$category = $em->getRepository('Category')->findOneById($id);

// but i'm "deleted"
$category->isDeleted(); // === true

[docteurklein]

hey, thanks for the note :)

Can you make a PR with the changes please ?