Doesn't build with ruby 3.3

in the package() function the build crashes with these errors:

rb_event_thread.c:144:20: error: passing argument 1 of ‘rb_thread_create’ from incompatible pointer type [-Wincompatible-pointer-types]
rb_channel.c:764:40: error: passing argument 1 of ‘rb_thread_create’ from incompatible pointer type [-Wincompatible-pointer-types]
rb_compression_options.c:302:56: error: passing argument 2 of ‘grpc_compression_algorithm_name’ from incompatible pointer type [-Wincompatible-pointer-types]