OTA Web server documentation is invalid

As you can see [there](https://arduino-esp8266.readthedocs.io/en/latest/ota_updates/readme.html#http-server) on the OTA web server example there is code like this
```cpp
ESPhttpUpdate.update("192.168.0.2", 80, "/arduino.bin");
```
or this
```cpp
t_httpUpdate_return ret = ESPhttpUpdate.update("192.168.0.2", 80, "/esp/update/arduino.php", "optional current version string here");
```
which is invalid, as you can see on ESP8266httpUpdate.cpp at line 152
```cpp
HTTPUpdateResult ESP8266HTTPUpdate::update(const String& host, uint16_t port, const String& uri,
const String& currentVersion)
{
HTTPClient http;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
http.begin(host, port, uri);
#pragma GCC diagnostic pop
return handleUpdate(http, currentVersion, false);
}
```
it says that's deprecated, could you please update the documentation?