Fix typo

Author: matklad

text/0000-standard-lazy-types.md

@@ -191,7 +191,7 @@ pub static FOO: Lazy<RefCell<u32>> = Lazy::new(|| RefCell::new(1));
 
 However, `#[thread_local]` attribute is pretty far from stabilization at the moment, and due to the required special handling of destructors, it's unclear if just using `cell::Lazy` will work out.
 
-Unlike `lazy_static!`, `Lazy` can be used used for locals:
+Unlike `lazy_static!`, `Lazy` can be used for locals:
 
 ```rust
 use std::cell::Lazy;