Switch to v4 actions

Author: coatless

.github/workflows/altdoc.yaml

@@ -36,7 +36,7 @@ jobs:
       # Upload the CRAN repository for use in the next step
       # Make sure to set a retention day to avoid running into a cap
       - name: Upload build artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: rwasmrepo
           path: |
@@ -92,7 +92,7 @@ jobs:
       # Download the built R WASM CRAN repository from the prior step.
       # Extract it into the `_site` directory
       - name: Download build artifact
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: rwasmrepo
           path: _site
@@ -101,7 +101,7 @@ jobs:
       # Make sure to set a retention day to avoid running into a cap
       # This artifact shouldn't be required after deployment onto pages was a success.
       - name: Upload Pages artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v4
         with: 
           retention-days: 1
 
@@ -110,4 +110,4 @@ jobs:
       # instead of using `docs/` or the `gh-pages` branch of the repository
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4