resolve build error

Author: laujan

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

@@ -41,7 +41,7 @@ items:
     href: concepts/capabilities.md
   - name: Analyzer templates
     displayName: analyzer, templates, document, text, images, video, audio, multimodal, visual, structured, content, field, extraction
-    href: concepts/analyzer-templates.md  
+    href: concepts/analyzer-templates.md
   - name: Document
     displayName: document, text, images, video, audio, visual, structured, content, field, extraction
     href: document/overview.md
@@ -55,13 +55,13 @@ items:
     href: video/overview.md
     displayName: video, audio, voice, recognition, synthesis, speaker, identification, verification, diarization, transcription, translation, language, understanding, sentiment, analysis, emotion, detection, pronunciation, model
 - name: Concepts
-    items:
-      - name: Best practices
-        displayName: best practices, analyzers, optimization, fields
-        href: concepts/best-practices.md
-      - name: Accuracy and confidence
-        displayName: accuracy, confidence, analyzers, optimization, fields, scores
-        href: concepts/accuracy-confidence.md  
+  items:
+    - name: Best practices
+      displayName: best practices, analyzers, optimization, fields
+      href: concepts/best-practices.md
+    - name: Accuracy and confidence
+      displayName: accuracy, confidence, analyzers, optimization, fields, scores
+      href: concepts/accuracy-confidence.md
 - name: Responsible AI
   items:
     - name: Transparency note
@@ -73,4 +73,4 @@ items:
   - name: REST API
     displayName: quota, tiers, throttle, max, adjustments, requests, support, ocr
     href: /rest/api/contentunderstanding/operation-groups?view=rest-contentunderstanding-2024-12-01-preview&preserve-view=true
-  
+