Adding entries in the single server card

Author: shriram-muthukrishnan

articles/mysql/single-server/index.yml

@@ -96,6 +96,10 @@ landingContent:
         links:
           - text: Configure server parameters
             url: ../howto-server-parameters.md
+          - text: Choose the right tools for migration to Azure Database for MySQL
+            url: ../how-to-decide-on-right-migration-tools.md
+          - text: Migrate from single server to flexible server
+            url: ../howto-migrate-single-flexible-minimum-downtime.md            
           - text: Migrate using Data Migration Service
             url: ../howto-migrate-online.md
           - text: Migrate using dump and restore