update workflow

.github/workflows/build.yml

@@ -9,21 +9,21 @@ jobs:
       name: build contents
       runs-on: ubuntu-latest
       steps:
-        - uses: actions/checkout@v2
+        - uses: actions/checkout@v4
         - name: install pandoc
           run: |
               curl -LO https://github.com/jgm/pandoc/releases/download/2.16.2/pandoc-2.16.2-1-amd64.deb && sudo dpkg -i pandoc-2.16.2-1-amd64.deb
-        - uses:  actions/setup-python@v2
+        - uses:  actions/setup-python@v5
           with:
-            python-version: '3.9.5'
+            python-version: '3.10'
         - name: make build
           run: make build
         - name: Test website
           uses: docker://klakegg/html-proofer:3.19.2
           with:
             entrypoint: /usr/local/bundle/bin/htmlproofer
             args: public --check-html --empty-alt-ignore --only-4xx
-        - uses: actions/upload-artifact@v2
+        - uses: actions/upload-artifact@v4
           with:
             name: contents
             path: public