Update ipfs-senc.md

dfc5f7f3 · jihao · GitHub · 1673a7f1 · dfc5f7f3
--- a/ipfs-senc.md
+++ b/ipfs-senc.md
@@ -3,7 +3,7 @@
 * https://github.com/jbenet/ipfs-senc

 ```
-* ipfs-senc share <path-to-file-or-directory>
+* ipfs-senc -w share <path-to-file-or-directory>
 ```

 ```