doc: filesystems : Fix typo in Documentations/filesystems

Correct spelling typo in Documentations/filesystems.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/filesystems/xfs.txt b/Documentation/filesystems/xfs.txt
index 12525b1..5be51fd 100644
--- a/Documentation/filesystems/xfs.txt
+++ b/Documentation/filesystems/xfs.txt
@@ -135,7 +135,7 @@
 	If the memory cost of 8 log buffers is too high on small
 	systems, then it may be reduced at some cost to performance
 	on metadata intensive workloads. The logbsize option below
-	controls the size of each buffer and so is also relevent to
+	controls the size of each buffer and so is also relevant to
 	this case.
 
   logbsize=value