Merge pull request #8771 from sevend2/AddTocSQL

adds toc

Author: HaiyingYu

support/sql/database-engine/connect/toc.yml

@@ -7,8 +7,12 @@ items:
   href: troubleshoot-ssl-errors-login-process.md
 - name: Cannot generate SSPI context
   href: cannot-generate-sspi-context-error.md
+- name: Can't use Kerberos unconstrained delegation
+  href: windows-prevents-unconstrained-delegation.md
 - name: Change NETMON parser port for SQL Server
   href: change-netmon-parser-port-for-sql-server.md
+- name: Certificate validation failure
+  href: certificate-validation-failure.md
 - name: Consistent authentication connectivity issues
   href: consistent-authentication-connectivity-issues.md
   items: