Apply suggestions from code review

Author: v-regandowner

articles/sap/center-sap-solutions/view-cost-analysis.md

@@ -31,7 +31,7 @@ The following Azure resources aren't included in the SAP system-level cost analy
 - Virtual networks
 - Storage accounts
 - Azure NetApp files (ANF)
-- Azure Key Vaults
+- Azure Key Vault
 - Azure Monitor for SAP solutions resources
 - Azure Backup resources