Update index.yml

Author: Juliako

articles/media-services/index.yml

@@ -45,6 +45,9 @@ highlightedContent:
     - title: Azure Media Services specifications
       itemType: concept
       url: media-services-specifications-live-timed-metadata.md
+    - title: Azure Media Player
+      itemType: concept
+      url: azure-media-player/azure-media-player-overview.md
 
 conceptualContent: 
 # itemType: architecture | concept | deploy | download | get-started | how-to-guide | learn | overview | quickstart | reference | tutorial | whats-new