Update README.md

PaintYourDragon · web-flow · commit b9504fc5760b · 2023-02-24T10:00:06.000-08:00
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+NOTE: not recommended for new designs. The CircuitPython Thermal Printer library is preferred going forward:
+https://github.com/adafruit/Adafruit_CircuitPython_Thermal_Printer
+
 # Python-Thermal-Printer Module
 
 Python3 port of the original Adafruit [Python-Thermal-Printer](https://github.com/adafruit/Python-Thermal-Printer) library.
