bump action

Author: thrasibule

.github/workflows/main.yml

@@ -49,7 +49,7 @@ jobs:
       # Publish built docs to gh-pages branch.
       - name: Checkout documentation branch
         if: matrix.python-version == '3.11'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: gh-pages
           path: gh-pages