Merge branch 'maint-2025-04-21' into 'main'

Add maintenance window 2025-04-21

See merge request !13

announcement.md

+There is a planned maintenance window affecting Cheaha GPU nodes and Cloud.rc from April 21-27, 2025. These resources will be unavailable during this window.
+
+Read more at our News page: https://docs.rc.uab.edu/news/#2025-04-21-planned-maintenance-window

motd

@@ -30,3 +30,9 @@ For more information on Cheaha and the tools available to support research pleas
 Use of Cheaha, and other UABRC resources, is governed by the
 [UAB Acceptable Use Policy for Computer and Network Resources](https://secure2.compliancebridge.com/uab/portal/getdoc.php?file=300)
 and other relevant [UAB IT Policies](https://www.uab.edu/it/home/policies).
+
+----------- !! Planned Maintenance !! -----------
+
+There is a planned maintenance window affecting Cheaha GPU nodes and Cloud.rc from April 21-27, 2025. These resources will be unavailable during this window.
+
+Read more at our News page: https://docs.rc.uab.edu/news/#2025-04-21-planned-maintenance-window