chore(Grid): add sections in footer and group footer templates

Author: ntacheva

components/grid/templates/column-footer.md

@@ -82,6 +82,9 @@ You can use [aggregates]({%slug grid-aggregates%}) for the current field directl
 
 ![Blazor Grid Footer Template](images/footer-template.png)
 
+## Using Components in Grid Column Footer Templates
+
+@[template](/_contentTemplates/grid/common-link.md#using-components-in-templates)
 
 ## Notes
 

components/grid/templates/column-group-footer.md

@@ -79,6 +79,9 @@ When the grid is grouped, the columns can display a footer with information abou
 
 ![Blazor Grid Column Group Footer Template](images/column-group-footer-template.png)
 
+## Using Components in Grid Group Footer Templates
+
+@[template](/_contentTemplates/grid/common-link.md#using-components-in-templates)
 
 ## See Also