Add actions/checkout GitHub action to docs-publish (#2518)

Author: Kludex

.github/workflows/publish.yml

@@ -11,7 +11,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -63,6 +62,7 @@ jobs:
       contents: write
 
     steps:
+      - uses: actions/checkout@v4
       - name: Download artifacts
         uses: actions/download-artifact@v4
         with: