Add missing asterisk to doxygen closures

Clarify section names next to closing braces
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/include/mbedtls/ssl_cookie.h b/include/mbedtls/ssl_cookie.h
index 86698b0..34452aa 100644
--- a/include/mbedtls/ssl_cookie.h
+++ b/include/mbedtls/ssl_cookie.h
@@ -42,7 +42,7 @@
 #define MBEDTLS_SSL_COOKIE_TIMEOUT     60 /**< Default expiration delay of DTLS cookies, in seconds if HAVE_TIME, or in number of cookies issued */
 #endif
 
-/* \} name SECTION: Module settings */
+/** \} name SECTION: Module settings */
 
 #ifdef __cplusplus
 extern "C" {