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/ctr_drbg.h b/include/mbedtls/ctr_drbg.h
index 959a5d5..2b66b53 100644
--- a/include/mbedtls/ctr_drbg.h
+++ b/include/mbedtls/ctr_drbg.h
@@ -135,7 +135,7 @@
 /**< The maximum size of seed or reseed buffer in bytes. */
 #endif
 
-/* \} name SECTION: Module settings */
+/** \} name SECTION: Module settings */
 
 #define MBEDTLS_CTR_DRBG_PR_OFF             0
 /**< Prediction resistance is disabled. */