Update CHANGELOG.md

Author: zolanaj

CHANGELOG.md

@@ -25,6 +25,10 @@ Classify the change according to the following categories:
     ### Deprecated
     ### Removed
 
+## max-ashp-dispatch
+### Added
+- New parameter `force_dispatch` in the **ASHPSpaceHeater** and **ASHPWaterHeater** technologies (default = `false`).  When set to `true`, the ASHP's thermal output will be the minimum of the site load(s) served and the system size (adjusted for timestep-specific capacity factor) in each period.
+
 ## load-year-align
 ### Fixed
 - Align heating and cooling load profiles based on electric load year input, if using custom electric load profile with simulated (CRB or schedule-based flatloads) heating/cooling loads