caches-queues-lists: fix typo in comment

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/squashfs-tools/caches-queues-lists.c b/squashfs-tools/caches-queues-lists.c
index 722b326..e57d775 100644
--- a/squashfs-tools/caches-queues-lists.c
+++ b/squashfs-tools/caches-queues-lists.c
@@ -267,7 +267,7 @@
 
 	/*
 	 * The default use freelist before growing cache policy behaves
-	 * poorly with appending - with many deplicates the caches
+	 * poorly with appending - with many duplicates the caches
 	 * do not grow due to the fact that large queues of outstanding
 	 * fragments/writer blocks do not occur, leading to small caches
 	 * and un-uncessary performance loss to frequent cache