ci(release): 移除镜像仓库名中的 -vpc 后缀

镜像路径恢复为 d8d-user-release（仅 registry 使用 VPC 地址）

🤖 Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

.gitea/workflows/release.yaml

@@ -59,4 +59,4 @@ jobs:
           file: ./Dockerfile
           push: true
           tags: |
-            registry-vpc.cn-beijing.aliyuncs.com/d8dcloud/d8d-user-release-vpc:${{ env.REPO_NAME }}-${{ env.VERSION }}
+            registry-vpc.cn-beijing.aliyuncs.com/d8dcloud/d8d-user-release:${{ env.REPO_NAME }}-${{ env.VERSION }}