chore: make some documents clearer (#115)

Signed-off-by: reddaisyy <reddaisy@outlook.jp>

Author: reddaisyy

src/global_rng.rs

@@ -6,7 +6,7 @@ use std::cell::Cell;
 use std::ops::RangeBounds;
 use std::vec::Vec;
 
-// Chosen by fair roll of the dice.
+// Chosen by a fair roll of the dice.
 const DEFAULT_RNG_SEED: u64 = 0xef6f79ed30ba75a;
 
 impl Default for Rng {

src/lib.rs

@@ -86,7 +86,7 @@
 //!
 //! # WebAssembly Notes
 //!
-//! For non-WASI WASM targets, there is additional sublety to consider when utilizing the global RNG.
+//! For non-WASI WASM targets, there is additional subtlety to consider when utilizing the global RNG.
 //! By default, `std` targets will use entropy sources in the standard library to seed the global RNG.
 //! However, these sources are not available by default on WASM targets outside of WASI.
 //!