Fix to sgxtime.md. Thanks to @weikengchen
diff --git a/documents/sgxtime.md b/documents/sgxtime.md
index 777dddc..aad3aea 100644
--- a/documents/sgxtime.md
+++ b/documents/sgxtime.md
@@ -25,7 +25,7 @@
 
 ```bash
 $ docker run -ti -v /path/to/sdk:/root/sgx \
-             --device /dev/isgx simp \
+             --device /dev/isgx \
              --device /dev/mei0 \
              rust-sgx-docker    # This name is identified during docker build
 root@913e6a00c8d8:~#