T7635: OpenConnect Certificate Authentication - Fix ocserv jinja template

Author: giga1699

data/templates/ocserv/ocserv_config.j2

@@ -31,7 +31,7 @@ auth = "plain[otp=/run/ocserv/users.oath]"
 auth = "plain[/run/ocserv/ocpasswd]"
 {%     endif %}
 {% elif "cert" in authentication.mode %}
-auth = certificate
+auth = "certificate"
 cert-user-oid = {{ authentication.mode.cert }}
 {% else %}
 auth = "plain[/run/ocserv/ocpasswd]"