revert overview.md

Author: Jessie Huang

docs/azure/migration/appmod/overview.md

@@ -87,4 +87,4 @@ App Modernization for .NET (Preview) supports the following scenarios:
 
 - [Quickstart: Assessing an application and applying code changes](quickstart.md)
 - [Common modernization issues with predefined tasks](predefined-tasks.md)
-- [Frequently Asked Questions](faq.md)
+- [Frequently Asked Questions](faq.md)