Add changelog

Author: gdalle

DifferentiationInterfaceTest/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/JuliaDiff/DifferentiationInterface.jl/compare/DifferentiationInterfaceTest-v0.10.1...main)
 
+### Fixed
+
+  - Refactor test loops ([#848](https://github.com/JuliaDiff/DifferentiationInterface.jl/pull/848))
+
 ## [0.10.1](https://github.com/JuliaDiff/DifferentiationInterface.jl/compare/DifferentiationInterfaceTest-v0.10.0...DifferentiationInterfaceTest-v0.10.1)
 
 ### Added