update toc link

Author: PatrickFarley

articles/ai-foundry/toc.yml

@@ -238,7 +238,7 @@ items:
           - name: Protected material detection
             href: ./openai/concepts/content-filter-protected-material.md
           - name: Personally identifiable information (PII) detection
-            href: ./concepts/content-filter-personal-information.md
+            href: ./openai/concepts/content-filter-personal-information.md
           - name: Content filter configurability
             href: ./openai/concepts/content-filter-configurability.md
           - name: Content filter annotations