[HTTP] Fixed memory leak

src/protocols/HTTP.cpp

@@ -161,6 +161,7 @@ int16_t HTTPClient::post(const char* url, const char* content, String& response,
   int16_t state = _tl->openTransportConnection(host, "TCP", _port);
   delete[] host;
   if(state != ERR_NONE) {
+    delete[] request;
     return(state);
   }