docs(changelog): adding change log for grpby

Author: ChronosSF

CHANGELOG.md

@@ -5,8 +5,10 @@ All notable changes for each version of this project will be documented in this
 ## 10.0.0
 
 ### General
+- `igxGrid`
+    - **Behavioral Change** - Group rows now display the group column's header name instead of field when one is available.
 - `igx-select`, `igx-combo`, `igx-drop-down`
-- **Behavioral Change** - The select, combo, and dropdown items now have display block and text-overflow ellipsis enabled by default.
+    - **Behavioral Change** - The select, combo, and dropdown items now have display block and text-overflow ellipsis enabled by default.
 - `IgxTransaction` - The `onStateUpdate` now emits with information of its origin. The emitted value is of type `StateUpdateEvent`, which has two properties:
     - `origin` - it can vary within the values of the `TransactionEventOrigin` interface; 
     - `actions` - contains information about the transactions, that caused the emission of the event.