Update node/README.md

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

node/README.md

@@ -79,7 +79,7 @@ cargo fmt --all
 yarn workspace joystream-testing test
 ```
 
-To run the integration tests with a different chain, you can omit step running the local development chain and set the node URL using `NODE_URL` environment variable.
+To run the integration tests with a different chain, you can omit the step of running the local development chain and simply set the node URL using `NODE_URL` environment variable.
 
 ### Installing a release build