Adding an architecture card for the WAF guide

Author: normesta

articles/storage/blobs/index.yml

@@ -26,6 +26,13 @@ landingContent:
         links:
           - text: What is Azure Blob Storage?
             url: storage-blobs-overview.md
+    # Card
+  - title: Architecture
+    linkLists:
+      - linkListType: architecture
+        links:
+          - text: Azure Well-Architected Framework considerations
+            url: /azure/well-architected/service-guides/azure-blob-storage?toc=/azure/storage/blobs/toc.json
   # Card
   - title: Get started
     linkLists: