Update apidocs.yml

.github/workflows/apidocs.yml

@@ -26,11 +26,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - name: Set up PDM
+        uses: pdm-project/setup-pdm@v2
         with:
           python-version: "3.9"
-      - run: pip install pip setuptools wheel
-      - run: pip install pdm
       - run: pdm sync
       - run: pdm run docs
       - name: Setup Pages