Update README to include available templates

Added a section listing available templates for Azure migration and backup services.

Author: brown9804

10_migration-backup/README.md

@@ -12,6 +12,11 @@ Last updated: 2025-02-21
 > [!IMPORTANT]
 > This folder contains sample Terraform templates for Azure migration and backup services. These templates are starting points and should be customized based on your application needs.
 
+## Templates available
+
+- [Azure Data Protection Backup Vault](./backup)
+- [Azure Site Recovery (Recovery Services Vault)](./site-recovery)
+
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