Update actions/checkout dependency

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
   unit-test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@4
       - uses: ruby/setup-ruby@v1
       - name: Install dependencies
         run: bundle install
@@ -22,7 +22,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@4
       - uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true

.github/workflows/issue_ops.yml

@@ -53,7 +53,7 @@ jobs:
               repo: context.repo.repo,
               labels: ['actions-importer-running']
             })
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@4
       - uses: ruby/setup-ruby@v1
         # ImageOs must be configured to match the OS of the runner when using self-hosted runners.
         # env: