fix comment issues

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index e93e55b..6b17667 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -960,14 +960,14 @@
 void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl );
 #if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
 /**
- * \brief           TLS1.3 client side state machine entry
+ * \brief           TLS 1.3 client side state machine entry
  *
  * \param ssl       SSL context
  */
 int mbedtls_ssl_tls13_handshake_client_step( mbedtls_ssl_context *ssl );
 
 /**
- * \brief           TLS1.3 server side state machine entry
+ * \brief           TLS 1.3 server side state machine entry
  *
  * \param ssl       SSL context
  */