Update README.md to use standard compose.yaml file name

Signed-off-by: johnthagen <[email protected]>

README.md

@@ -52,7 +52,7 @@ Quick Start
 Using Docker Compose is a three-step process:
 1. Define your app's environment with a `Dockerfile` so it can be
    reproduced anywhere.
-2. Define the services that make up your app in `docker-compose.yml` so
+2. Define the services that make up your app in `compose.yaml` so
    they can be run together in an isolated environment.
 3. Lastly, run `docker compose up` and Compose will start and run your entire
    app.