CI: Add 3.2, 3.3 to matrix (#4)

.github/workflows/ci.yml

@@ -11,10 +11,10 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        ruby: [ 1.9, '2.0', 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, ruby-head, jruby, truffleruby ]
+        ruby: [ 1.9, '2.0', 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, 3.2, 3.3, ruby-head, jruby, truffleruby ]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Install Ruby 1.9
       if: matrix.ruby == '1.9'
@@ -46,9 +46,9 @@ jobs:
   install:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.0'
+        ruby-version: '3.3'
     - run: gem build spinels-rack-ssl-enforcer
     - run: gem install *.gem