added the release note

Author: JV0812

blog-service/2025-06-18-dashboards.md

@@ -0,0 +1,12 @@
+---
+title: Scope Based Variable (Dashboard)
+image: https://help.sumologic.com/img/sumo-square.png
+keywords:
+  - dashboard
+  - scope-based-variable
+hide_table_of_contents: true    
+---
+
+import useBaseUrl from '@docusaurus/useBaseUrl';
+
+We are excited to introduce our new template variable creation method - Scope Based Variables. This method helps you to define a variable that automatically applies to all log queries within the scope of the dashboard or panels. [Learn more](/docs/dashboards/filter-template-variables).