Added preview to the SAP Systems articles.

Author: MaryMichael-MS

articles/migrate/toc.yml

@@ -45,7 +45,7 @@ items:
       href: tutorial-discover-gcp.md
     - name: Discover Spring Boot apps
       href: tutorial-discover-spring-boot.md
-    - name: Discover SAP systems
+    - name: Discover SAP systems (preview)
       href: tutorial-discover-sap-systems.md
   - name: Decide
     items:
@@ -85,7 +85,7 @@ items:
       href: tutorial-assess-spring-boot.md
     - name: Build business case or assess imported servers for migration to Azure
       href: tutorial-discover-import.md
-    - name: Assess SAP systems for migration
+    - name: Assess SAP systems for migration (preview)
       href: tutorial-assess-sap-systems.md
   - name: Migrate
     items:
@@ -165,7 +165,7 @@ items:
       href: concepts-azure-vmware-solution-assessment-calculation.md
     - name: Assessment best practices
       href: best-practices-assessment.md
-    - name: Assessment overview (discover and assess SAP Systems)
+    - name: Assessment overview (discover and assess SAP Systems) (preview)
       href: concepts-azure-sap-systems-assessment.md
   - name: Migrate
     items: