Update deploy.yml

Author: Uechann

.github/workflows/deploy.yml

@@ -78,7 +78,7 @@ jobs:
             # 환경 변수 설정
             AWS_REGION=ap-northeast-2
             ECR_REGISTRY=${{ steps.login-ecr.outputs.registry }}
-            ECR_REPO=christmas-backend
+            ECR_REPO=hackathon-backend
             
             # ECR 로그인
             aws ecr get-login-password --region ${AWS_REGION} \