Fix missing ActionRunsUsingGo (#20)

- Allow `using: "go"` when unmarshalling YAML.
- Add `ActionRunsUsingGo` to returned errors.

Co-authored-by: Zettat123 <zettat123@gmail.com>
Reviewed-on: https://gitea.com/gitea/act/pulls/20
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Zettat123 <zettat123@noreply.gitea.io>
Co-committed-by: Zettat123 <zettat123@noreply.gitea.io>

pkg/runner/action.go

@@ -182,6 +182,7 @@ func runActionImpl(step actionStep, actionDir string, remoteAction *remoteAction
 				model.ActionRunsUsingNode12,
 				model.ActionRunsUsingNode16,
 				model.ActionRunsUsingComposite,
+				model.ActionRunsUsingGo,
 			}, action.Runs.Using))
 		}
 	}