fix: missing defaults in nodejs pre (#1349)

* Update action.go

* add Test

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/runner/action.go

@@ -481,6 +481,8 @@ func runPreStep(step actionStep) common.Executor {
 
 		switch action.Runs.Using {
 		case model.ActionRunsUsingNode12, model.ActionRunsUsingNode16:
+			// defaults in pre steps were missing, however provided inputs are available
+			populateEnvsFromInput(ctx, step.getEnv(), action, rc)
 			// todo: refactor into step
 			var actionDir string
 			var actionPath string