Update changelog

Author: brews

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Changed
 - Quiet unused(?), common, logging messages to terminal. ([PR #14](https://github.com/ClimateImpactLab/dscim/pull/14), [@brews](https://github.com/brews))
+### Fixed
+- Add missing `self` arg to `global_consumption_calculation` abstract method. ([PR #43](https://github.com/ClimateImpactLab/dscim/pull/43), [@brews](https://github.com/brews))
 
 ## [0.1.0] - 2022-08-30
 - Initial release.