Update cd.yml

Author: dlwls423

.github/workflows/cd.yml

@@ -63,7 +63,7 @@ jobs:
         with:
           host: ${{ secrets.HOST_NAME }}
           username: ${{ secrets.USER_NAME }}
-          password: ${{ secrets.USER_PASSWORD }}
+          key: ${{ secrets.SSH_KEY }}
           port: ${{ secrets.PORT }}
           script: |
             docker pull ${{ secrets.DOCKER_USER }}/kodaero:latest