Update unicode-xid benchmark ratio

Author: dtolnay

README.md

@@ -13,7 +13,7 @@ Implementation of [Unicode Standard Annex #31][tr31] for determining which
 
 This crate is a better optimized implementation of the older `unicode-xid`
 crate. This crate uses less static storage, and is able to classify both ASCII
-and non-ASCII codepoints with better performance, 2–6× faster than
+and non-ASCII codepoints with better performance, 6× faster than
 `unicode-xid`.
 
 <br>

src/lib.rs

@@ -13,8 +13,8 @@
 //!
 //! This crate is a better optimized implementation of the older `unicode-xid`
 //! crate. This crate uses less static storage, and is able to classify both
-//! ASCII and non-ASCII codepoints with better performance, 2–6×
-//! faster than `unicode-xid`.
+//! ASCII and non-ASCII codepoints with better performance, 6× faster than
+//! `unicode-xid`.
 //!
 //! <br>
 //!