fix: optimize git pull in pdoc workflow

Replaced custom git pull command with `actions/checkout@v4` in the pdoc documentation generation workflow. This change streamlines the checkout process, leveraging a more robust and standardized approach provided by GitHub Actions. It ensures compatibility and potential performance improvements in our CI/CD pipeline.

.forgejo/workflows/pdoc.yml

@@ -25,8 +25,7 @@ jobs:
           apt install -y python3 python3-pip git
 
       - name: Git pull
-        run: |
-          git pull
+        uses: actions/checkout@v4
 
       - name: Install Python dependencies
         run: |