Update toc

Typo patch

Author: PeterCLu

articles/machine-learning/service/toc.yml

@@ -194,7 +194,7 @@
       - name: "Predict flight delays"
         displayName: classification, studio
         href:  how-to-designer-sample-classification-flight-delay.md
-      - name: "Test classification"
+      - name: "Text classification"
         displayName: classification, studio
         href:  how-to-designer-sample-text-classification.md
     - name: Use estimators for ML