Update CHANGELOG.md

CHANGELOG.md

@@ -26,12 +26,14 @@ Classify the change according to the following categories:
     ##### Removed
     ### Patches
 
-## Develop 2023/09/06
+## v2.16.0
 ### Minor Updates
 ##### Added
 - /v3 endpoints which use the reoptjl app and the REopt.jl Julia package, but /stable still points to /v2 so this is not a breaking change
 ##### Fixed
 - Fixed a bug in the `get_existing_chiller_default_cop` endpoint not accepting blank/null inputs that are optional
+##### Changed
+- Modified production k8s server resources to best match v3 resource consumption (v2 will still work fine, but may have less throughput)
 
 ## v2.15.0
 ### Minor Updates