Merge pull request #324 from 0xPolygonMiden/greenhat/i323-fix-guide

doc: add `--release` option to `cargo miden build` command

docs/usage/cargo-miden.md

@@ -58,7 +58,7 @@ Now that you've created your project, compiling it to Miden Assembly is as easy
 following command from the root of the project directory:
 
 ```bash
-cargo miden build
+cargo miden build --release
 ```
 
 This will emit the compiled artifacts to `target/miden`.