Update articles/communication-services/tutorials/chat-app-teams-embed.md

Co-authored-by: Emlyn Bolton <[email protected]>

Author: Leah-Xia-Microsoft

articles/communication-services/tutorials/chat-app-teams-embed.md

@@ -133,7 +133,7 @@ Thread IDs represent conversations between groups of communication identifiers.
 
 ### Sample app for this solution
 
-This [sample app](https://github.com/Azure-Samples/communication-services-messaging-teams-app) demonstrated how to build this solution for a customer support scenario.
+This [sample app](https://github.com/Azure-Samples/communication-services-messaging-teams-app) demonstrates how to build a solution for a customer support scenario.
 
 ### Chat bots