Update GH Actions (#34)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/deploy-docs.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Download source
         uses: actions/checkout@v4
       - name: Install Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.11'
       - name: Install dependencies
@@ -24,7 +24,7 @@ jobs:
       - name: Build site
         run: mkdocs build -f docs/mkdocs.yml --strict
       - name: Upload to GitHub Pages
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: site
   deploy:
@@ -37,7 +37,7 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}