Update TOC.yml

Author: SunilVeldurthi

articles/data-factory/TOC.yml

@@ -1306,6 +1306,9 @@ items:
     - name: Diagnose connectivity in Azure-SSIS IR
       href: ssis-integration-runtime-diagnose-connectivity-faq.md
       displayName: timeout, troubleshooting
+    - name: Azure Data Factory known issues
+      href: knownissues-troubleshoot-guide.md
+      displayName: troubleshooting      
 - name: SAP knowledge center
   items:
   - name: Overview