textproc/rubygem-ferret: Mark BROKEN with Ruby 3.x

compiling compound_io.c
In file included from compound_io.c:1:
./index.h:595:25: error: width of bit-field 'is_compressed' (2 bits) exceeds width of its type (1 bit)

bool                is_compressed : 2; /* set to 2 after all data is loaded */
                    ^

1 error generated.

• Error code 1

PR: 262520
Approved by: maintainer timeout