Doc: Update doc link to rand_os
@@ -38,7 +38,7 @@ use subtle::ConstantTimeEq;
/// types used throughout orion, implement their own `generate()` function and
/// it is strongly preferred to use those, compared to `secure_rand_bytes()`.
///
-/// This uses rand's [OsRng](https://docs.rs/rand/0.6.0/rand/rngs/struct.OsRng.html).
+/// This uses rand_os's [OsRng](https://docs.rs/rand_os/).
///
/// # Parameters:
/// - `dst`: Destination buffer for the randomly generated bytes. The amount of
