Update 02.4.md

fix mispelling: embdedded -> embedded

en/02.4.md

@@ -92,7 +92,7 @@ func main() {
 
 I've just introduced to you how to define a struct with field names and type. In fact, Go supports fields without names, but with types. We call these embedded fields.
 
-When the embedded field is a struct, all the fields in that struct will implicitly be the fields in the struct in which it has been embdedded.
+When the embedded field is a struct, all the fields in that struct will implicitly be the fields in the struct in which it has been embedded.
 
 Let's see one example.
 ```Go