Update node/README.md

Co-authored-by: Ben Holden-Crowther <4144334+blrhc@users.noreply.github.com>

node/README.md

@@ -66,7 +66,7 @@ Running full suite of checks, tests, formatting and linting:
 yarn cargo-checks
 ```
 
-Always format your rust code with `cargo fmt` before commiting:
+Always format your rust code with `cargo fmt` before committing:
 
 ```bash
 cargo fmt --all