build.sh fails on Mac OS with recent clang (was fixed in MicroPython)

I'm trying to add my library to the Community Bundle but when I go to run `build.sh` I get errors like this while building `mpy-cross`:
```
GEN build/genhdr/qstrdefs.generated.h
In file included from ../py/emitnx64.c:16:
../py/emitnative.c:2267:5: error: variable length array folded to constant array as an extension [-Werror,-Wgnu-folding-constant]
2267 | MP_STATIC_ASSERT(MP_OBJ_STOP_ITERATION == 0);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../py/misc.h:57:51: note: expanded from macro 'MP_STATIC_ASSERT'
57 | #define MP_STATIC_ASSERT(cond) ((void)sizeof(char[1 - 2 * !(cond)]))
| ^~~~~~~~~~~~~~~
1 error generated.
-e See https://learn.adafruit.com/building-circuitpython; Adafruit Discord #circuitpython-dev
make: *** [build/py/emitnx64.o] Error 1
```

This was fixed in MicroPython a couple of weeks ago; see https://github.com/micropython/micropython/issues/18116
and it was fixed by https://github.com/micropython/micropython/commit/33cf1ab3ccabecd156176ceebcd56332e8a5d325

And it was fixed in CircuitPython 10.0.0.

However, it looks like `build.sh` wants to build CircuitPython 9.2.4 instead of that.