Update website/docs/usage.mdx

Author: JamieSlome

website/docs/usage.mdx

@@ -29,7 +29,7 @@ npx -- @finos/git-proxy
 npx -- @finos/git-proxy-cli
 ```
 
-If you use a proxy server to access npm then please note that you also need to configure your proxy for npx before running the above commands:
+If you use a proxy server to access `npm` then please note that you also need to configure your proxy for `npx` before running the above commands:
 
 ```bash
 npx config set https-proxy <company-proxy-endpoint>