Adding Konflux Maintenance Window Banner (#7424)

Target cluster - stone-stg-rh01
Type of change - New Banner
Purpose of change - Weekly Konflux Maintenance Window

Author: manish-jangra

components/konflux-info/staging/stone-stg-rh01/banner-content.yaml

@@ -1,2 +1,9 @@
+- summary: "Konflux Maintenance Window Every Friday"
+  type: "info"
+  dayOfWeek: 5
+  startTime: "02:00"
+  endTime: "06:00"
+  timeZone: "America/Los_Angeles"
+
 - type: info
   summary: Want to **display important updates** here? [See how to create a banner](https://github.com/redhat-appstudio/infra-deployments/blob/main/components/konflux-info/README.md).