From the GitHub release page:
This is CircuitPython 7.3.3, the latest bugfix revision of CircuitPython, and is a new stable release.
Notable changes to 7.3.3 since 7.3.2

Adafruit MatrixPortal: Turn off ulab to allow freezing adafruit_portalbase, to create more available RAM.
Return None from usb_hid.get_last_received_report() when no report is available or the last report has already been read.
Don’t reload or enter REPL when autoreloading.
Fix _bleio.PacketBuffer handling of fixed-length characteristics.
Update frozen libraries.
Build macOS mpy-cross executables with macOS 11.

Download from circuitpython.org
Firmware downloads are available from the downloads page on circuitpython.org. The site makes it easy to select the correct file and language for your board.
Installation
To install follow the instructions in the Welcome to CircuitPython! guide. To install the latest libraries, see this page in that guide.
Try the latest version of the Mu editor for creating and editing your CircuitPython programs and for easy access to the CircuitPython serial connection (the REPL).
Documentation
Documentation is available in readthedocs.io.
Port status
CircuitPython … // Read more: original article.

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