updated location

.cloud/.azure/test/test_workspace.json

@@ -4,6 +4,6 @@
     "create_workspace": true,
     "friendly_name": "gha_and_aml_rg",
     "create_resource_group": true,
-    "location": "southcentralUS",
+    "location": "southcentralus",
     "sku": "basic"
 }