Improves ImportResolver example (#2299)

Signed-off-by: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>

experimental/importresolver_example_test.go

@@ -43,11 +43,6 @@ func Example_importResolver() {
 
 	wasi_snapshot_preview1.MustInstantiate(ctx, r)
 
-	const numInstances = 3
-	mods := make([]*mod, numInstances)
-	for i := range mods {
-		mods[i] = &mod{}
-		m := mods[i]
 	idm, err := r.CompileModule(ctx, inoutdispatcherWasm)
 	if err != nil {
 		log.Panicln(err)
@@ -57,6 +52,12 @@ func Example_importResolver() {
 		log.Panicln(err)
 	}
 
+	const numInstances = 3
+	mods := make([]*mod, numInstances)
+	for i := range mods {
+		mods[i] = &mod{}
+		m := mods[i]
+
 		const inoutDispatcherModuleName = "inoutdispatcher"
 
 		dispatcherInstance, err := r.InstantiateModule(ctx, idm,