name: CI

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        ruby-version:
          - 2.5
          - 2.6
          - 2.7
          - '3.0'
          - 3.1
    steps:
    - uses: actions/checkout@v2
    - name: Set up Ruby ${{ matrix.ruby-version }}
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby-version }}
        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
    - name: Run tests
      run: bundle exec rake

name: CI

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest

    strategy:
      matrix:
        ruby-version:
          - 2.7
          - '3.0'
          - 3.1
    steps:
    - uses: actions/checkout@v3
    - name: Set up Ruby ${{ matrix.ruby-version }}
      uses: ruby/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby-version }}
        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
    - name: Run tests
      run: bundle exec rake

Drop Ruby 2.5, 2.6. EOL.
CI: Drop Ruby 2.5, 2.6. EOL.

Also update the checkout Action.