How about changing interpretation of version string

Many users who wants use 3.0.x write ruby-version: 3.0 by mistake.

3.0 interpreted as 3 on GitHub Actions.

For example, following workflow step prints 3 only.

        env:
          env_var: 3.0
        run: |
          set -x
          echo ${env_var}

So I propose changing the meaning of 3 (and 3.0 on workflow files) use 3.0.x, and 3.x (or something) use latest 3.x.x.

After this change, many users can write 3.0 intentionally, and some (probably less) users who want use latest 3.x.x can write 3.x or something instead.

Comece rastreando como a entrada ruby-version é interpretada nos arquivos de workflow do GitHub Actions, usando como caso motivador o exemplo relatado do valor de ambiente 3.0. Defina e verifique os significados pretendidos de 3, 3.0 e 3.x, incluindo o impacto de compatibilidade nos workflows existentes.