CI updates

Author: gkellogg

.github/workflows/ci.yml

@@ -19,16 +19,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby:
-          - 2.6
-          - 2.7
-          - "3.0"
-          - 3.1
-          - ruby-head
-          - jruby
+        ruby: [2.6, 2.7, '3.0', 3.1, ruby-head, jruby]
     steps:
       - name: Clone repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
@@ -52,11 +46,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby:
-          - 3.1
+        ruby: [3.1]
     steps:
       - name: Clone repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/generate-docs.yml

@@ -10,7 +10,7 @@ jobs:
     name: Update gh-pages with docs
     steps:
       - name: Clone repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: