Update scabbard upload command in Splinter README
The scabbard CLI's contract upload command has been updated, so this
updates the grid-on-splinter readme to reflect the changes.
@@ -358,7 +358,8 @@ circuits.
5. Upload the smart contract.
```
- root@scabbard-cli-alpha:/# scabbard contract upload ./xo_0.4.2.scar \
+ root@scabbard-cli-alpha:/# scabbard contract upload xo:0.4.2 \
+ --path . \
-k gridd \
-U 'http://splinterd-alpha:8085' \
--service-id $CIRCUIT_ID::grid-scabbard-a
