Update workflows and use Node 20

Author: BrianMitchL

Diff for: .github/workflows/ci.yml

@@ -6,11 +6,11 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: '18.x'
+          node-version: 20
       - name: Install dependencies
         run: npm ci
       - name: Check formatting

Diff for: .github/workflows/deploy.yml

@@ -7,19 +7,19 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
-          node-version: '18.x'
+          node-version: 20
       - name: Install dependencies
         run: npm ci
       - name: Check formatting
         run: npm run check
       - name: Build site
         run: npm run build
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_branch: gh-pages