Expand example

Author: oprypin

README.md

@@ -11,8 +11,12 @@ Works on Ubuntu, macOS, Windows.
 steps:
   - uses: oprypin/install-crystal@v1
   - run: crystal eval "puts 1337"
+  - uses: actions/checkout@v2
+  - run: crystal spec
 ```
 
+Also see [.github/workflows/release.yml](.github/workflows/release.yml) as an example.
+
 ## Usage
 
 ### Inputs