add example

Author: ncalteen

.env.example

@@ -10,6 +10,7 @@ ACTIONS_STEP_DEBUG=true
 # GitHub Actions inputs should follow `INPUT_<name>` format (case-sensitive).
 # Hyphens should not be converted to underscores!
 INPUT_MILLISECONDS=2400
+INPUT_MY-INPUT=mona
 
 # GitHub Actions default environment variables. These are set for every run of a
 # workflow and can be used in your actions. Setting the value here will override