Replace absolute links with relative link

Replace absolute links with relative link for tag contributor role definition

Author: jithinsarath

articles/cost-management-billing/costs/understand-cost-mgt-data.md

@@ -114,7 +114,7 @@ Cost Management receives tags as part of each usage record submitted by the indi
 - Resource tags are only included in usage data while the tag is applied – tags aren't applied to historical data.
 - Resource tags are only available in Cost Management after the data is refreshed.
 - Resource tags are only available in Cost Management when the resource is active/running and producing usage records. For example, when a VM is deallocated.
-- Managing tags requires contributor access to each resource or the [tag contributor](https://learn.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#tag-contributor) RBAC role.
+- Managing tags requires contributor access to each resource or the [tag contributor](../../role-based-access-control/built-in-roles.md#tag-contributor) RBAC role.
 - Managing tag policies requires either owner or policy contributor access to a management group, subscription, or resource group.
 
 If you don't see a specific tag in Cost Management, consider the following questions: