Apply suggestions from code review

Co-authored-by: Galina Edinakova <[email protected]>

Author: igdmdimitrov

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes for each version of this project will be documented in this file.
 
-## 21.0.0
+## 20.2.0
 
 ### General
 - `IgxHierarchicalGrid`

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid.component.ts

@@ -590,7 +590,7 @@ export class IgxHierarchicalGridComponent extends IgxHierarchicalGridBaseDirecti
      * const schema = this.grid.schema;
      * this.grid.schema = [{ name: 'Products', fields: [...], childEntities: [...] }];
      * ```
-     * @deprecated in version 21.0.0.
+     * @deprecated in version 20.2.0.
      */
     @Input()
     public set schema(entities: EntityType[]) {}