Point to docs.rs for documentation

mbrubeck · mbrubeck · commit dae6460244be · 2017-06-23T08:35:22.000-07:00
(because Servo isn't always using the latest version of this crate)
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 rust-smallvec
 =============
 
-[Documentation](http://doc.servo.org/smallvec/)
+[Documentation](http://docs.rs/smallvec/)
 
 "Small vector" optimization for Rust: store up to a small number of items on the stack
