chore(docs): Fix broken link in README.md (#791)

README.md

@@ -94,7 +94,7 @@ The Peripheral Access Crates (PACs) are automatically generated from Microchip S
 
 ### `async` APIs
 
-[`atsamd_hal`](https://crates.io/crate/atsamd-hal) provides APIs for using `async`/`await` constructs with some of its peripherals. To enable `async` support, use the `async` Cargo feature.
+[`atsamd_hal`](https://crates.io/crates/atsamd-hal) provides APIs for using `async`/`await` constructs with some of its peripherals. To enable `async` support, use the `async` Cargo feature.
 Detailed documentation is provided in the `atsamd_hal::async_hal` module. The [metro_m4](https://github.com/atsamd-rs/atsamd/tree/master/boards/metro_m4/examples) and
 [feather_m0](https://github.com/atsamd-rs/atsamd/tree/master/boards/feather_m0/examples) feature complete examples showing how to use async APIs.