Update README.rst

Co-Authored-By: Scott Shawcroft <[email protected]>

Author: deshipu

README.rst

@@ -95,7 +95,7 @@ Differences from `MicroPython <https://github.com/micropython/micropython>`__
 CircuitPython:
 
 -  Supports native USB on all boards, allowing file editing without special tools.
--  Supports only SAMD21, SAMD51, nRF52840, CXD56, STM32F4 and i.MX ports.
+-  Supports only SAMD21, SAMD51, nRF52840, CXD56, STM32F4 and i.MX RT ports.
 -  Tracks MicroPython's releases (not master).
 -  Floats (aka decimals) are enabled for all builds.
 -  Error messages are translated into 10+ languages.