fix security_connector.c formatting

src/core/lib/security/transport/security_connector.c

@@ -78,7 +78,7 @@ void grpc_set_ssl_roots_override_callback(grpc_ssl_roots_override_callback cb) {
 
 /* Defines the cipher suites that we accept by default. All these cipher suites
    are compliant with HTTP2. */
-#define GRPC_SSL_CIPHER_SUITES                                            \
+#define GRPC_SSL_CIPHER_SUITES \
   "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384"
 
 static gpr_once cipher_suites_once = GPR_ONCE_INIT;