ci.yml in attr_json-2.4.0

- old
+ new

@@ -63,13 +63,16 @@
             ruby: 3.2
 
           - gemfile: rails_7_1
             ruby: 3.3
 
+          - gemfile: rails_7_2
+            ruby: 3.3
+
     name: ${{ matrix.gemfile }}, ruby ${{ matrix.ruby }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}