Fixing typo Encryption

Author: gkomatsu

articles/virtual-desktop/security-guide.md

@@ -90,7 +90,7 @@ Monitor your Azure Virtual Desktop service's usage and availability with [Azure
 
 ### Encrypt your VM
 
-Encrypt your VM with [managed disk encryptio options](../virtual-machines/disk-encryption-overview.md) to protect stored data from unauthorized access. 
+Encrypt your VM with [managed disk encryption options](../virtual-machines/disk-encryption-overview.md) to protect stored data from unauthorized access. 
 
 ## Session host security best practices