proto/invoice -> bgpwtf/invoice/proto

Change-Id: I5d25864046665e4b0e57ec62a29797fbce6ed3cb
diff --git a/bgpwtf/invoice/model.go b/bgpwtf/invoice/model.go
index d628e1a..1fb89b9 100644
--- a/bgpwtf/invoice/model.go
+++ b/bgpwtf/invoice/model.go
@@ -13,7 +13,7 @@
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
-	pb "code.hackerspace.pl/hscloud/proto/invoice"
+	pb "code.hackerspace.pl/hscloud/bgpwtf/invoice/proto"
 )
 
 type model struct {