fix: remove pip cache from sync-contentful workflow to resolve dependency file detection error

Author: zhaojing1987

.github/workflows/sync-contentful.yml

@@ -0,0 +1,41 @@
+# 从 Contentful CMS 自动生成 App 应用的元数据文档（_include/）和 App 文档骨架。
+# 触发方式：管理员手动触发（workflow_dispatch），需要仓库 Write 权限 + CONTENTFUL_ACCESS_TOKEN。
+# 注意：该 workflow 生成的 _include/ 文件不应手工修改，属于自动管理内容。
+
+name: Sync from Contentful
+
+on:
+  workflow_dispatch:
+
+jobs:
+  generate:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install Jinja2 requests contentful
+
+    - name: Generate Markdown files
+      env:
+        CONTENTFUL_ACCESS_TOKEN: ${{ secrets.CONTENTFUL_GRAPHQLTOKEN }}
+      run: |
+        python builds/sync_contentful.py template/meta/zh_head.jinja2 versioned_docs/version-2.0/apps/_include
+        python builds/sync_contentful.py template/meta/en_head.jinja2 i18n/en/docusaurus-plugin-content-docs/version-2.0/apps/_include
+        python builds/sync_contentful.py template/meta/zh_app.jinja2 versioned_docs/version-2.0/apps --ignore-list template/meta/skip_file.json
+        python builds/sync_contentful.py template/meta/en_app.jinja2 i18n/en/docusaurus-plugin-content-docs/version-2.0/apps --ignore-list template/meta/skip_file.json
+        
+    - name: Commit and push changes
+      uses: stefanzweifel/git-auto-commit-action@v5
+      with:
+        commit_message: Automated generation product markdown header