missing stream methods information on Serial page

[noniwoo]

A page https://www.arduino.cc/reference/en/language/functions/communication/serial/ does not have description of methods readStringUntil() or readString() nor it does contain information that says all methods from https://www.arduino.cc/reference/en/language/functions/communication/stream/ are available on a Serial object. Solution may be writing that all methods from stream are available on the Serial object (if this is true). This issue is somewhat linked to https://github.com/arduino/Arduino/issues/3718