Fix Doxygen marks

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 020f062..6562c22 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -514,23 +514,23 @@
 #endif /* MBEDTLS_SSL_SESSION_TICKETS */
 
 #if defined(MBEDTLS_SSL_CLI_C)
-    /*!< Minimum TLS version to be negotiated.
+    /** Minimum TLS version to be negotiated.
      *
-     *   It is set up in the ClientHello writing preparation stage and used
-     *   throughout the ClientHello writing. Not relevant anymore as soon as
-     *   the protocol version has been negotiated thus as soon as the
-     *   ServerHello is received.
-     *   For a fresh handshake not linked to any previous handshake, it is
-     *   equal to the configured minimum minor version to be negotiated. When
-     *   renegotiating or resuming a session, it is equal to the previously
-     *   negotiated minor version.
+     *  It is set up in the ClientHello writing preparation stage and used
+     *  throughout the ClientHello writing. Not relevant anymore as soon as
+     *  the protocol version has been negotiated thus as soon as the
+     *  ServerHello is received.
+     *  For a fresh handshake not linked to any previous handshake, it is
+     *  equal to the configured minimum minor version to be negotiated. When
+     *  renegotiating or resuming a session, it is equal to the previously
+     *  negotiated minor version.
      *
-     *   There is no maximum TLS version field in this handshake context.
-     *   From the start of the handshake, we need to define a current protocol
-     *   version for the record layer which we define as the maximum TLS
-     *   version to be negotiated. The `tls_version` field of the SSL context is
-     *   used to store this maximum value until it contains the actual
-     *   negotiated value.
+     *  There is no maximum TLS version field in this handshake context.
+     *  From the start of the handshake, we need to define a current protocol
+     *  version for the record layer which we define as the maximum TLS
+     *  version to be negotiated. The `tls_version` field of the SSL context is
+     *  used to store this maximum value until it contains the actual
+     *  negotiated value.
      */
     mbedtls_ssl_protocol_version min_tls_version;
 #endif