Update setup.md

Use a more recent version that doesn't have strange rpc dependancies as noted here paritytech/substrate#12358

docs/getting-started/setup.md

@@ -62,5 +62,5 @@ You can [download a binary from our releases page](https://github.com/paritytech
 (Linux and Mac). Alternatively you can build the node by yourself:
 
 ```bash
-cargo install contracts-node --git https://github.com/paritytech/substrate-contracts-node.git --tag v0.17.0 --force --locked
+cargo install contracts-node --git https://github.com/paritytech/substrate-contracts-node.git --tag v0.23.0 --force --locked
 ```