[Changelog] Add entry for FAQ

Author: nvzqz

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog] and this project adheres to
 - `assert_impl_one!` macro
 - `assert_trait_sub_all!` macro
 - `assert_trait_super_all!` macro
+- Frequently asked questions to `README.md`
 
 ### Fixed
 - `assert_eq_size_val!`, `const_assert_eq!`, and `const_assert_ne!` to export