chore(*): Add Changelog Note.

Author: MKirova

CHANGELOG.md

@@ -1,6 +1,16 @@
 # Ignite UI for Angular Change Log
 
 All notable changes for each version of this project will be documented in this file.
+
+## 15.0.0
+
+### New Features
+- `igxGrid` - exposing new Input properties:
+
+    - `sortHeaderIconTemplate` - Gets/Sets a custom template that should be used when rendering a header sorting indicator when columns are not sorted.
+    - `sortAscendingHeaderIconTemplate` - Gets/Sets a custom template that should be used when rendering a header sorting indicator when columns are sorted in asc order.
+    - `sortDescendingHeaderIconTemplate` - Gets/Sets a custom template that should be used when rendering a header sorting indicator when columns are sorted in desc order.
+
 ## 14.2.0
 
 ### New Features