docs: Fix SLUB docs typo

There is a minor typo in SLUB documentation.

Fix typo.

Signed-off-by: Tobin C. Harding <[e-mail]>
Acked-by: Mike Rapoport <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/vm/slub.rst

···
 	(list_lock) where contention may occur.
 
 ``slub_min_order``
-	specifies a minim order of slabs. A similar effect like
+	specifies a minimum order of slabs. A similar effect like
 	``slub_min_objects``.
 
 ``slub_max_order``