Update add_ssh_deploy_server.yml

Update to actions/checkout@v4

so that it runs on Node.js 20 instead of Node.js 16

.github/workflows/add_ssh_deploy_server.yml

@@ -7,7 +7,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Deploy to server (lokasbot)
         uses: appleboy/[email protected]
         with: