lint.yml in slack_webhook_logger-0.7.0

- old
+ new

@@ -10,10 +10,10 @@
 
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Ruby
         uses: yettoapp/actions/setup-languages@main
         with:
           ruby: true