Bluetooth: Mesh: Fixed shell call to metadata-encode

The call to metadata-encode call in code and documentation
does does not match. Because the shell call in the documentation
looks correct the shell call in the code has been changed by
removeing the double metadata request.

Signed-off-by: Ingar Kulbrandstad <[email protected]>

Author: Balaklaka

subsys/bluetooth/mesh/shell/dfu.c

@@ -960,7 +960,7 @@ SHELL_STATIC_SUBCMD_SET_CREATE(
 		      "{<SigMID>|<VndCID> <VndMID>}...",
 		      cmd_dfu_comp_elem_add, 5, 10),
 	SHELL_CMD_ARG(comp-hash-get, NULL, "[<Key>]", cmd_dfu_comp_hash_get, 1, 1),
-	SHELL_CMD_ARG(metadata-encode, NULL, "<Major> <Minor> <Rev> <BuildNum> <Size> "
+	SHELL_CMD_ARG(encode, NULL, "<Major> <Minor> <Rev> <BuildNum> <Size> "
 		      "<CoreType> <Hash> <Elems> [<UserData>]",
 		      cmd_dfu_metadata_encode, 9, 1),
 	SHELL_SUBCMD_SET_END);