Pluralize TOC entry

Author: kevinmic99

articles/spring-cloud/toc.yml

@@ -160,7 +160,7 @@
           href: how-to-enable-system-assigned-managed-identity.md
         - name: Create roles and permissions
           href: how-to-permissions.md
-        - name: Use a TLS/SSL certificate
+        - name: Use TLS/SSL certificates
           href: how-to-use-tls-certificate.md
         - name: Enable end-to-end Transport Layer Security
           href: how-to-enable-end-to-end-tls.md