xfs: fix a comment typo in xfs_select_zone_nowait()

Fix a typo in the comment describing the second call to
xfs_select_open_zone_lru() in xfs_select_zone_nowait().

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

Author: damien-lemoal

fs/xfs/xfs_zone_alloc.c

@@ -693,7 +693,7 @@ xfs_select_zone_nowait(
 		goto out_unlock;
 
 	/*
-	 * Try to find an zone that is an ok match to colocate data with.
+	 * Try to find a zone that is an ok match to colocate data with.
 	 */
 	oz = xfs_select_open_zone_lru(zi, write_hint, XFS_ZONE_ALLOC_OK);
 	if (oz)