Update GitHub Actions workflows

- update actions/setup-node to fix extra 10 minute delay in CI
- update Node.js
- use version ranges instead of commit hashes to get future updates
  automatically (we already trust the GitHub Actions team)
- remove actions/configure-pages as it doesn't do anything for us

Author: GarboMuffin

.github/workflows/deploy.yml

@@ -15,22 +15,19 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      uses: actions/checkout@v4
       with:
         persist-credentials: false
-    - name: Setup GitHub Pages
-      id: pages
-      uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b
     - name: Install Node.js
-      uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af
+      uses: actions/setup-node@v4
       with:
-        node-version: 20
+        node-version: 22
     - name: Install dependencies
       run: npm ci
     - name: Build
       run: npm run build
     - name: Upload artifact
-      uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa
+      uses: actions/upload-pages-artifact@v3
       with:
         path: ./build
 
@@ -46,4 +43,4 @@ jobs:
     steps:
     - name: Deploy to GitHub Pages
       id: deployment
-      uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e
+      uses: actions/deploy-pages@v4

.github/workflows/validate.yml

@@ -6,12 +6,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+    - uses: actions/checkout@v4
       with:
         persist-credentials: false
     - name: Install Node.js
-      uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af
+      uses: actions/setup-node@v4
       with:
-        node-version: 20
+        node-version: 22
     - run: npm ci
     - run: npm run build