Ruby-head builds are broken on Windows due to "fatal error: rb_mjit_min_header-3.2.0.h: No such file or directory"

[ivoanjo]

See https://github.com/ivoanjo/backtracie/runs/7888944992?check_suite_focus=true:

Run bundle exec rake
D:/rubyinstaller-head-x64/bin/ruby.exe -I. -r.rake-compiler-siteconf.rb ../../../../ext/backtracie_native_extension/extconf.rb
checking for whether -fvisibility=hidden is accepted as CFLAGS... yes
creating extconf.h
creating Makefile
make.exe
generating backtracie_native_extension-x64-mingw-ucrt.def
compiling ../../../../ext/backtracie_native_extension/backtracie.c
compiling ../../../../ext/backtracie_native_extension/backtracie_frames.c
In file included from ../../../../ext/backtracie_native_extension/backtracie_frames.c:114:
./extconf.h:3:26: fatal error: rb_mjit_min_header-3.2.0.h: No such file or directory
    3 | #define RUBY_MJIT_HEADER "rb_mjit_min_header-3.2.0.h"
      |                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:[24](https://github.com/ivoanjo/backtracie/runs/7888944992?check_suite_focus=true#step:4:25)7: backtracie_frames.o] Error 1
rake aborted!
Command failed with status (2): [make.exe...]
D:/a/backtracie/backtracie/vendor/bundle/ruby/3.2.0+2/gems/rake-compiler-1.2.0/lib/rake/extensiontask.rb:181:in `block (2 levels) in define_compile_tasks'
D:/a/backtracie/backtracie/vendor/bundle/ruby/3.2.0+2/gems/rake-compiler-1.2.0/lib/rake/extensiontask.rb:180:in `block in define_compile_tasks'
D:/a/backtracie/backtracie/vendor/bundle/ruby/3.2.0+2/gems/rake-13.0.6/exe/rake:[27](https://github.com/ivoanjo/backtracie/runs/7888944992?check_suite_focus=true#step:4:28):in `<top (required)>'
Tasks: TOP => default => compile => compile:x64-mingw-ucrt => compile:backtracie_native_extension:x64-mingw-ucrt => copy:backtracie_native_extension:x64-mingw-ucrt:3.2.0 => tmp/x64-mingw-ucrt/backtracie_native_extension/3.2.0/backtracie_native_extension.so
(See full trace by running task with --trace)
mkdir -p tmp/x64-mingw-ucrt/backtracie_native_extension/3.2.0
cd tmp/x64-mingw-ucrt/backtracie_native_extension/3.2.0
cd -
cd tmp/x64-mingw-ucrt/backtracie_native_extension/3.2.0
Error: Process completed with exit code 1.