Update broken link to vtr website

Signed-off-by: Daniel Lim Wee Soong <weesoong.lim@gmail.com>

README.md

diff --git a/README.md b/README.md
index fbd6edc..8036943 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # Utilities for working with VtR XML Files
 
 This repository contains utilities for working with
-[Verilog to Routing](https://verilog-to-routing.org) XML files.
+[Verilog to Routing](https://verilogtorouting.org) XML files.