s/servo/rust-lang-nursery/ in README.md

Missed the most important part of the last commit... r=me

Author: fitzgen

README.md

@@ -32,7 +32,7 @@ extern "C" {
 
 ## Users Guide
 
-[📚 Read the `bindgen` users guide here! 📚](https://servo.github.io/rust-bindgen)
+[📚 Read the `bindgen` users guide here! 📚](https://rust-lang-nursery.github.io/rust-bindgen)
 
 ## API Reference