update fwlinks

Author: ivorb

learn-pr/wwl-data-ai/optimize-generative-ai-model-performance/includes/6-exercise.md

@@ -5,4 +5,8 @@ Now, it's your chance to explore how to optimize the performance of a language m
 
 Launch the exercise and follow the instructions.
 
-[![Button to launch exercise.](../media/launch-exercise.png)](https://go.microsoft.com/fwlink/?linkid=YOURPLACEHOLDER&azure-portal=true)
+[![Button to launch exercise.](../media/launch-exercise.png)](https://go.microsoft.com/fwlink/?linkid=2354219&azure-portal=true)
+
+An additional optional lab is available to complete, walking through how to fine-tune a model with your own data. Training can take some time, but if you'd like experience with fine tuning, follow the instructions below.
+
+[![Button to launch exercise.](../media/launch-exercise.png)](https://go.microsoft.com/fwlink/?linkid=2354220&azure-portal=true)