Update toc.yml

Author: aahill

articles/ai-services/agents/toc.yml

@@ -40,6 +40,8 @@ items:
           href: how-to/tools/licensed-data.md
       - name: Action tools
         items:
+        - name: OpenAPI specified tools
+          href: how-to/tools/openapi-spec.md
         - name: Agent function calling
           href: how-to/tools/function-calling.md
         - name: Logic app function calling