update toc

Author: mumian

articles/azure-resource-manager/bicep/toc.yml

@@ -687,6 +687,8 @@
       href: diagnostics/bcp153.md
     - name: BCP166
       href: diagnostics/bcp166.md
+    - name: BCP170
+      href: diagnostics/bcp170.md
     - name: BCP192
       href: diagnostics/bcp192.md
     - name: BCP266