Pick the last score

Signed-off-by: noopur <[email protected]>

.github/workflows/federated_runtime.yml

@@ -111,7 +111,7 @@ jobs:
         echo "Notebook run was successful"
         echo "| Aggregated model validation score |" >> $GITHUB_STEP_SUMMARY
         echo "| -------------- |" >> $GITHUB_STEP_SUMMARY
-        echo $(grep -oP 'Aggregated model validation score = \K[\d.]+' ~/results/director.log) >> $GITHUB_STEP_SUMMARY
+        echo $(grep -oP 'Aggregated model validation score = \K[\d.]+' ~/results/director.log | tail -1) >> $GITHUB_STEP_SUMMARY
 
     - name: Tar files
       if: ${{ always() }}   # collect artifacts regardless of failures