ci: 砍掉构建里的多余动作

- fetch-depth: 0 → 默认浅克隆(没启用 enableGitInfo,Hugo 不读 git 历史)
- submodules: recursive → true(只有 themes/stack 一层,无嵌套)
- install → mv(二进制解压即可执行,不需要 chmod/chown)

.gitea/workflows/build.yml

@@ -21,14 +21,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          submodules: recursive
-          fetch-depth: 0
+          submodules: true
 
       - name: Install Hugo Extended
         run: |
           HUGO_VERSION=0.161.1
           curl -fsSL "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.tar.gz" | tar -xz
-          install hugo /usr/local/bin/
+          mv hugo /usr/local/bin/
           hugo version
 
       - name: Build site