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/entropy.h b/include/mbedtls/entropy.h
index fede05f..14e8b31 100644
--- a/include/mbedtls/entropy.h
+++ b/include/mbedtls/entropy.h
@@ -69,7 +69,7 @@
 #define MBEDTLS_ENTROPY_MAX_GATHER      128     /**< Maximum amount requested from entropy sources */
 #endif
 
-/* \} name SECTION: Module settings */
+/** \} name SECTION: Module settings */
 
 #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
 #define MBEDTLS_ENTROPY_BLOCK_SIZE      64      /**< Block size of entropy accumulator (SHA-512) */