fixing link

Author: aahill

articles/ai-services/cognitive-services-container-support.md

@@ -124,6 +124,7 @@ Install and explore the functionality provided by containers in Azure AI service
 [ad-containers]: anomaly-Detector/anomaly-detector-container-howto.md
 [cv-containers]: computer-vision/computer-vision-how-to-install-containers.md
 [lu-containers]: luis/luis-container-howto.md
+[su-containers]: language-service/summarization/how-to/use-containers.md
 [sp-containers]: speech-service/speech-container-howto.md
 [spa-containers]: ./computer-vision/spatial-analysis-container.md
 [sp-containers-lid]: speech-service/speech-container-lid.md