Added changelog entry for LAI interpolation bug fix

CHANGELOG.md
- Add entry describing the fix in PR #254

Signed-off-by: Bob Yantosca <yantosca@seas.harvard.edu>

CHANGELOG.md

@@ -5,12 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased 3.8.0] - TBD
+## [Unreleased] - TBD
 ### Changed
 - Updated TOMAS_Jeagle sea salt extension
 
 ### Fixed
 - Updated IsModelLevel check for CESM and WRF-GC
+- Interpolation error for 8-day MODIS LAI files (removed month loop in `GetIndex2Interp`)
 
 ## [3.7.2] - 2023-12-01
 ### Added