fixing indentation error in index

Author: microsoftshawarma

articles/trusted-signing/index.yml

@@ -25,7 +25,7 @@ landingContent:
           - text: Implement Signing Integrations with Trusted Signing
             url: how-to-signing-integrations.md
   - title: Overview
-      linkLists:
+    linkLists:
         - linkListType: overview
           links:
             - text: Overview of Trusted Signing