ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]

[wallarh]

D:_ARDUINO\LIB\ESP32CompositeVideo-master\CompositeVideoSimple\CompositeVideoSimple.ino: In function 'void draw()':
D:_ARDUINO\LIB\ESP32CompositeVideo-master\CompositeVideoSimple\CompositeVideoSimple.ino:75:26: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
graphics.print("hello!");
^
D:_ARDUINO\LIB\ESP32CompositeVideo-master\CompositeVideoSimple\CompositeVideoSimple.ino:76:34: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
graphics.print(" free memory: ");
^
D:_ARDUINO\LIB\ESP32CompositeVideo-master\CompositeVideoSimple\CompositeVideoSimple.ino:78:38: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
graphics.print("\nrendered frame: ");
^
D:_ARDUINO\LIB\ESP32CompositeVideo-master\CompositeVideoSimple\CompositeVideoSimple.ino:81:38: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
graphics.print("\n in hex: ");
^