fix: british spelling (american linter) lol

internalsigner.go

@@ -23,9 +23,9 @@ func (is *InternalSigner) Sign(index uint32, unsignedTx *Tx) (signedTx *Tx, err
 		is.SigHashFlag = sighash.AllForkID
 	}
 
-	// TODO: v2 put tx serialisation in parent/general func (tx.Sign) so that the
+	// TODO: v2 put tx serialization in parent/general func (tx.Sign) so that the
 	// functions like that implement the Signer interface only sign and don't do
-	// tx input serialisation as well. So this Sign func would probably need to take
+	// tx input serialization as well. So this Sign func would probably need to take
 	// Sign(sigdigest []bytes)
 	var sh []byte
 	if sh, err = unsignedTx.GetInputSignatureHash(index, is.SigHashFlag); err != nil {

tx.go

@@ -458,8 +458,8 @@ func (tx *Tx) toBytesHelper(index int, lockingScript []byte) []byte {
 // signing implementations can be used to sign the transaction -
 // for example internal/local or external signing.
 func (tx *Tx) Sign(index uint32, s Signer) error {
-	// TODO: v2 put tx serialisation here so that the Signer.Sign
-	// func only does signing and not also serialisation which
+	// TODO: v2 put tx serialization here so that the Signer.Sign
+	// func only does signing and not also serialization which
 	// should be done here.
 
 	signedTx, err := s.Sign(index, tx)