Bump ruby/setup-ruby from 1.321.0 to 1.331.0 - #1350

Error: Unavailable version 3.3.7 for ruby on ubuntu-26.04 Only the latest patch release of each series is built for newer runner images. ruby-3.3.12 is available on ubuntu-26.04: use ruby-version: '3.3.12', or '3.3' to always use the latest 3.3.x release. Cause: Unexpected HTTP response: 404 at /home/runner/work/_actions/ruby/setup-ruby/824c0e29fdfc7d689c191c27acc969d2d04b7dd8/dist/index.js:45918:15 at process.processTicksAndRejections (node:internal/process/task_queues:104:5) at async body (/home/runner/work/_actions/ruby/setup-ruby/824c0e29fdfc7d689c191c27acc969d2d04b7dd8/dist/index.js:372:14)