message: docs: fix incorrect comment
diff: @@ -28,7 +28,7 @@ public:
  const std::string RateLimit = "envoy.ratelimit";
  // Redis proxy filter
  const std::string RedisProxy = "envoy.redis_proxy";
  - // IP tagging filter
  + // TCP proxy filter
  const std::string TcpProxy = "envoy.tcp_proxy";
  // Authorization filter
  const std::string ExtAuthorization = "envoy.ext_authz";
  