Update setup-ruby

.github/workflows/rspec.yml

@@ -27,16 +27,10 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Set up Ruby
-    # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
-    # change this to (see https://github.com/ruby/setup-ruby#versioning):
-    # uses: ruby/setup-ruby@v1
-      uses: ruby/setup-ruby@2b019609e2b0f1ea1a2bc8ca11cb82ab46ada124
+      uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: false
-    - name: Select bundler
-      if: ${{ startsWith(matrix.ruby-version, '2') }}
-      run: gem install bundler -v 2.4.22
     - name: Install gems
       run: bundle install
     - name: Set up yardocs