spec/ruby/library/matrix/: Change the version guard to 3.1.0
[Bug #17521] won't be backported until 3.1.0. https://github.com/ruby/spec/pull/832
spec/ruby/library/matrix/: Change the version guard to 3.1.0
[Bug #17521] won't be backported until 3.1.0.
https://github.com/ruby/spec/pull/832