ci.yml in mail-jdec-1.1.0

- old
+ new

@@ -6,19 +6,19 @@
   test:
     runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1]
-        gemfile: ['mail27']
+        ruby: [2.5, 2.6, 2.7, '3.0', 3.1, 3.2]
+        gemfile: ['mail28']
 
     name: ruby ${{ matrix.ruby }}, ${{ matrix.gemfile }}
 
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
     - name: Run test