CI: Consistent naming of steps

Follows rubocop/rubocop@99592fc

Author: Earlopain

.github/workflows/test.yml

@@ -28,10 +28,8 @@ jobs:
         ruby: ['2.7', '3.0', '3.1', '3.2', '3.3', 'head']
 
     steps:
-      - name: checkout
-        uses: actions/checkout@v4
-      - name: set up Ruby
-        uses: ruby/setup-ruby@v1
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
@@ -44,10 +42,8 @@ jobs:
     name: JRuby 9.4
     runs-on: ubuntu-latest
     steps:
-      - name: checkout
-        uses: actions/checkout@v4
-      - name: set up Ruby
-        uses: ruby/setup-ruby@v1
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: jruby-9.4
           bundler-cache: true
@@ -61,8 +57,7 @@ jobs:
     name: Prism
     steps:
       - uses: actions/checkout@v4
-      - name: set up Ruby
-        uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1
         with:
           # Specify the minimum Ruby version 2.7 required for Prism to run.
           ruby-version: 2.7
@@ -77,8 +72,7 @@ jobs:
     name: Check documentation syntax
     steps:
       - uses: actions/checkout@v4
-      - name: set up Ruby
-        uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 3.2
           bundler-cache: true
@@ -98,8 +92,7 @@ jobs:
           cat << EOF > Gemfile.local
             gem 'rubocop', '1.52.0' # Specify the oldest supported RuboCop version
           EOF
-      - name: set up Ruby
-        uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.7
           bundler-cache: true