addressed PR review comment

Author: AbhishekMallick-MS

articles/backup/toc.yml

@@ -550,7 +550,7 @@
       href: query-backups-using-azure-resource-graph.md
     - name: Resource Manager templates
       href: backup-rm-template-samples.md
-  - name: Security and Ransomware protectionm
+  - name: Security and Ransomware protection
     items:
     - name: Overview
       href: security-overview.md