Update get-started-with-real-time-text.md

fixing captions link

Author: tayaras

articles/communication-services/quickstarts/voice-video-calling/get-started-with-real-time-text.md

@@ -81,4 +81,4 @@ The `RealTimeTextInfo` (or `RealTimeTextDetails` on Windows) class encapsulates
 For more information, see the following articles:
 - Learn more about RTT in our [Real Time Text Conceptual Doc](../../concepts/voice-video-calling/real-time-text.md)
 - Learn more with our [Azure Communication Services Calling Documentation](../../concepts/voice-video-calling/calling-sdk-features.md)
-- Learn more about [Closed captions](https://learn.microsoft.com/en-us/azure/communication-services/concepts/voice-video-calling/closed-captions)
+- Learn more about [Closed captions](../../concepts/voice-video-calling/closed-captions.md)