mm/gup.c: fix typo in comments

Link: https://lkml.kernel.org/r/20230125180847.4542-1-jongwooo.han@gmail.comSigned-off-by: Jongwoo Han <jongwooo.han@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/gup.c

@@ -1055,7 +1055,7 @@ static int check_vma_flags(struct vm_area_struct *vma, unsigned long gup_flags)
  * This does not guarantee that the page exists in the user mappings when
  * __get_user_pages returns, and there may even be a completely different
  * page there in some cases (eg. if mmapped pagecache has been invalidated
- * and subsequently re faulted). However it does guarantee that the page
+ * and subsequently re-faulted). However it does guarantee that the page
  * won't be freed completely. And mostly callers simply care that the page
  * contains data that was valid *at some point in time*. Typically, an IO
  * or similar operation cannot guarantee anything stronger anyway because