yaml => yml

Author: softprops

README.md

@@ -14,7 +14,7 @@ $ npm install [email protected]
 
 💡 This serverless plugin assumes you are building Rustlang lambdas using the [lando](https://github.com/softprops/lando) or [crowbar](https://github.com/ilianaw/rust-crowbar) crates.
 
-Add the following to your serverless project's `serverless.yaml` file
+Add the following to your serverless project's `serverless.yml` file
 
 ```yaml
 service: demo