Update toc.yml

Author: laujan

articles/ai-services/content-understanding/toc.yml

@@ -65,8 +65,8 @@ items:
     - name: Accuracy and confidence
       displayName: accuracy, confidence, analyzers, optimization, fields, scores
       href: concepts/accuracy-confidence.md
-    - name: 🆕 Classifiers
-      displayName: classifiers, text, images, video, audio, multimodal, visual, structured, content, field, extraction
+    - name: 🆕 Classifier
+      displayName: classifier, text, images, video, audio, multimodal, visual, structured, content, field, extraction
       href: concepts/classifiers.md
     - name: 🆕 Analyzers overview
       displayName: content understanding capabilities, document, text, images, video, audio, visual, structured, content, field, extraction