fix(docs): Update 0.22 migration_notes.md w/ proper note interface (#…

…4701)

Updates the reference to 0.22 changes in the migration notes to use the
correct note interface

docs/docs/misc/migration_notes.md

@@ -394,22 +394,8 @@ impl CardNote {
     }
 }
 
-impl Serialize<CARD_NOTE_LEN> for CardNote {
-    fn serialize(self) -> [Field; CARD_NOTE_LEN] {
-        [self.owner.to_field()]
-    }
-}
-
-impl Deserialize<CARD_NOTE_LEN> for CardNote {
-    fn deserialize(serialized_note: [Field; CARD_NOTE_LEN]) -> Self {
-        CardNote {
-            owner: AztecAddress::from_field(serialized_note[2]),
-        }
-    }
-}
-
 impl NoteInterface for CardNote {
-    fn compute_note_hash(self) -> Field {
+    fn compute_note_content_hash(self) -> Field {
         pedersen_hash([
             self.owner.to_field(),
         ],0)
@@ -443,6 +429,17 @@ impl NoteInterface for CardNote {
         note.header
     }
 
+    fn serialize_content(self) -> [Field; CARD_NOTE_LEN]{
+        [self.owner.to_field()]
+    }
+
+    fn deserialize_content(serialized_note: [Field; CARD_NOTE_LEN]) -> Self {
+        AddressNote {
+            owner: AztecAddress::from_field(serialized_note[0]),
+            header: NoteHeader::empty(),
+        }
+    }
+
     // Broadcasts the note as an encrypted log on L1.
     fn broadcast(self, context: &mut PrivateContext, slot: Field) {
         let encryption_pub_key = get_public_key(self.owner);