renew bun command in demo.yaml

.gitea/workflows/demo.yaml

@@ -25,10 +25,13 @@ jobs:
         uses: http://fly6516.synology.me:4000/Gitea_Action/setup-node@v2
         with:
           node-version: '22' # 根据项目需求调整Node.js版本
-        env:
-          NODEJS_ORG_MIRROR: "https://mirrors.tuna.tsinghua.edu.cn/nodejs-release/" # 指定你的本地仓库地址
+        #env:
+          #NODEJS_ORG_MIRROR: "https://mirrors.tuna.tsinghua.edu.cn/nodejs-release/" # 指定你的本地仓库地址
 
-      - name: Install dependencies
+      - name: Install bun
+        run: npm install -g bun
+
+      - name: Install bun
         run: bun install
 
       - name: Run development server