fix(workflow): 简化 Docker 镜像标签配置，移除多余的标签类型

Author: Inblac

.github/workflows/docker.yml

@@ -35,10 +35,7 @@ jobs:
         with:
           images: ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=ref,event=branch
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=raw,value=latest,enable={{is_default_branch}}
+            type=raw,value=latest
 
       - name: Build and push
         uses: docker/build-push-action@v5

README.md

@@ -3,6 +3,7 @@
 ![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)
 ![Python: 3.9-3.12](https://img.shields.io/badge/python-3.9--3.12-green.svg)
 ![FastAPI](https://img.shields.io/badge/framework-FastAPI-009688.svg)
+[![Build and Push Docker Image](https://github.com/Inblac/z.ai2api_python/actions/workflows/docker.yml/badge.svg)](https://github.com/Inblac/z.ai2api_python/actions/workflows/docker.yml)
 
 基于 FastAPI 的高性能 OpenAI API 兼容代理服务，采用多提供商架构设计，支持 GLM-4.5 系列、K2Think、LongCat 等多种 AI 模型的完整功能。