Fix 0.7.1 changelog (#759)

<!-- Reference any GitHub issues resolved by this PR -->

Closes #

## Introduced changes

<!-- A brief description of the changes -->

- Move fuzzer related note to Unreleased section. Somehow it got added
to 0.7.1 section.

## Breaking changes

<!-- List of all breaking changes, if applicable -->

## Checklist

<!-- Make sure all of these are complete -->

- [x] Linked relevant issue
- [x] Updated relevant documentation
- [x] Added relevant tests
- [x] Performed self-review of the code
- [x] Added changes to `CHANGELOG.md`

Author: cptartur

CHANGELOG.md

@@ -9,19 +9,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Forge
 
+#### Added
+
+- Support for `u8`, `u16`, `u32`, `u64`, `u128`, `u256` types to fuzzer
+
 #### Changed
 
 - Spying events interface is updated to enable the use of events defined inside contracts in assertions
 
-
 ## [0.7.1] - 2023-09-27
 
 ### Forge
 
 #### Added
 
 - `var` library function for reading environmental variables
-- Support for `u8`, `u16`, `u32`, `u64`, `u128`, `u256` types to fuzzer
 
 ### Fixed
 - Using any concrete `block_id` when using forking mode, would lead to crashes