CI: Add windows-11-arm platform to test matrix - #1154

It failed on aarch64-mingw-ucrt since return VALUEs were truncated to lower 32 bit.

for better formatting

They hang like on ruby-3.4 and 3.3.

```
../../../../ext/ffi_c/DynamicLibrary.c:239:53: warning: format specifies type 'int' but the argument
      has type 'DWORD' (aka 'unsigned long') [-Wformat]
  239 |     snprintf(buf, size, "Failed with error %d: %s", error, message);
      |                                            ~~       ^~~~~
      |                                            %lu
```

`Ractor.make_shareable` doesn't freeze a module, since modules are Ractor-sharable by definition.
But from a users perspective it is unexpected, when it isn't frozen after calling freeze.
So better call super there.

Now one spec needs to be adjusted to avoid modifying the module after freeze.