HDXDSYS-753 fix changelog version

changelog.md

@@ -5,15 +5,20 @@ 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).
 
-## 0.8.7
+## 0.8.8
+
+### Changes
 
-## Changes
-- Add unit to food\_price table primary key
 - Rewrite enums to use values rather than variable names
 - Switch from "*" to "all" for rollup in enums
 - Add "intersectoral" to sample sector data (distinct from "all")
 - Ensure that constraint names end consistently with "\_constraint"
 
+## 0.8.7
+
+## Changes
+- Add unit to food\_price table primary key
+
 ## 0.8.6
 
 ## Changes