Update js/bundle.go

Co-authored-by: Oleg Bespalov <[email protected]>

js/bundle.go

@@ -439,7 +439,7 @@ func (b *Bundle) setInitGlobals(rt *sobek.Runtime, vu *moduleVUImpl, modSys *mod
 	warnAboutModuleMixing := func(name string) {
 		warnFunc := rt.ToValue(func() error {
 			return fmt.Errorf(
-				"you are trying to access identifier %q, this likely is due to mixing ESM and CommonJS syntax."+
+				"you are trying to access identifier %q, this likely is due to mixing ECMAScript Modules (ESM) and CommonJS syntax."+
 					"This isn't supported in the JavaScript standard, please use only one or the other",
 				name)
 		})