Update toc.yml

Author: laujan

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

@@ -64,7 +64,7 @@ items:
       href: concepts/accuracy-confidence.md
     - name: 🆕 Classifier
       displayName: classifier, text, images, video, audio, multimodal, visual, structured, content, field, extraction
-      href: concepts/classifiers.md
+      href: concepts/classifier.md
     - name: 🆕 Analyzers overview
       displayName: content understanding capabilities, document, text, images, video, audio, visual, structured, content, field, extraction
       href: concepts/analyzers-overview.md