Update CHANGELOG.md

Author: JSorngard

CHANGELOG.md

@@ -5,16 +5,21 @@ This file contains the changes to the crate since version 0.4.8.
 This version focuses on adding support for generating primes and sieving numbers in arbitrary ranges, instead of always having to start from 0.
 
 ## Breaking changes
+
  - Change the name of `are_prime` to `sieve`.
  - Change the name of `are_prime_below` to `sieve_lt`.
  - Change function signature of `sieve_lt`.
  - Change the name of `largest_prime_leq` to `previous_prime`.
  - Change the name of `smallest_prime_lt` to `next_prime`.
  - Remove `moebius`.
 
-## Other changes
+## Other major changes
 
  - Add `primes_geq`, `primes_lt`, and `sieve_geq` functions to work with arbitrary ranges.
  - Add `primes_segment!` and `sieve_segment!` macros to simplify usage of the above functions. These macros compute the size of the second const generic that the above functions need. Due to restrictions on const arithmetic this can not be done inside the functions (unless I convert their normal input into const generics instead).
  - Add `isqrt` function. This can be useful if you wish to compute the size of the second const generic yourself.
  - Speed up `PRIMES::count_primes_leq` by using a binary instead of linear search.
+
+## Minor changes
+
+ - Various documentation improvements.