randy f186a3e8ef Fix CI: ruby/setup-ruby doesn't recognize "file" as a version keyword ...

Omitting ruby-version entirely triggers its actual auto-detection from
.ruby-version — "file" was a mistaken guess and failed with "Unknown
engine file".

2026-08-27 14:06:31 +02:00

..

ci.yml

Fix CI: ruby/setup-ruby doesn't recognize "file" as a version keyword

2026-08-27 14:06:31 +02:00