update github actions

Author: luelista

.github/workflows/docs-ci.yml

@@ -27,17 +27,17 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: 3.x
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           key: ${{ github.ref }}
           path: .cache
       - run: pip install mkdocs-material git+https://github.com/luelista/pygments-pgdl-lexer.git
       - run: mkdocs build --site-dir public
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
         with:
           # Upload entire repository
           path: public
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v4