Add redirect for migration guide URL

Author: Peter Socha

articles/batch/.openpublishing.redirection.batch.json

@@ -200,6 +200,11 @@
             "redirect_url": "/azure/reliability/reliability-batch",
             "redirect_document_id": false
         },
+        {
+            "source_path_from_root": "/articles/batch/low-priority-vms-retirement-migration-guide.md",
+            "redirect_url": "/azure/batch/batch-spot-vms",
+            "redirect_document_id": false
+        },
         {
             "source_path_from_root": "/articles/batch/policy-samples.md",
             "redirect_url": "/azure/batch/policy-reference",