fix: github action for merge gate

Author: wangauone

.github/workflows/mcp_tests.yml

@@ -14,7 +14,15 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: '3.12'
-          cache: 'uv'
+
+      - name: Cache uv dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/uv
+          key: ${{ runner.os }}-uv-${{ hashFiles('**/uv.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-uv-
+
       - name: Install dependencies
         run: uv pip install .
         working-directory: ./mcp