docs(toolbar): mark actions grid prop as internal (#14502)

Author: damyanpetev

projects/igniteui-angular/src/lib/grids/toolbar/grid-toolbar-advanced-filtering.component.ts

@@ -32,6 +32,7 @@ export class IgxGridToolbarAdvancedFilteringComponent implements AfterViewInit {
     protected numberOfColumns: number;
     /**
      * Returns the grid containing this component.
+     * @hidden @internal
      */
     public get grid() {
         return this.toolbar.grid;

projects/igniteui-angular/src/lib/grids/toolbar/grid-toolbar.base.ts

@@ -99,6 +99,7 @@ export abstract class BaseToolbarDirective implements OnDestroy {
 
     /**
      * Returns the grid containing this component.
+     * @hidden @internal
      */
     public get grid() {
         return this.toolbar.grid;