Update README.md

README.md

@@ -15,7 +15,7 @@ A USB library which works seamlessly across most native and WASM targets.
 > [mdn web docs](https://developer.mozilla.org/en-US/docs/Web/API/WebUSB_API)
 
 > [!IMPORTANT]
-> When compiling this crate on a WASM target, you must use either
+> When compiling this crate on a WASM target, you must use either the rustflags
 > `RUSTFLAGS=--cfg=web_sys_unstable_apis` or by passing the argument in a
 > `.cargo/config.toml` file. Read more here: https://rustwasm.github.io/wasm-bindgen/web-sys/unstable-apis.html