docs: update changelog

docs: update changelog

Author: rjan90

CHANGELOG.md

@@ -9,7 +9,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### Changed
 - Made pricing constants (STORAGE_PRICE_PER_TIB_PER_MONTH, CACHE_MISS_PRICE_PER_TIB_PER_MONTH, CDN_PRICE_PER_TIB_PER_MONTH) mutable storage variables instead of immutable
-- Added `updatePricing()` function to allow owner to update pricing rates without contract upgrades
+- Added `updatePricing(uint256 newStoragePrice, uint256 newCacheMissPrice, uint256 newCdnPrice)` function to allow owner to update pricing rates without contract upgrades
+  - Pass 0 for any parameter to keep that price unchanged (selective updates)
+  - At least one parameter must be non-zero
+  - New rates apply to all active data sets on their next proving period update
 - Added `getCurrentPricingRates()` function to query current pricing values
 - Added `PricingUpdated` event to track pricing changes