Meta: bump GitHub Actions

Align with whatwg/spec-factory@c00f91c.

Author: annevk

.github/workflows/build.yml

@@ -15,13 +15,13 @@ jobs:
     name: Build
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
-        python-version: "3.10"
-    - uses: actions/setup-node@v3
+        python-version: "3.11"
+    - uses: actions/setup-node@v4
       with:
-        node-version: 18
+        node-version: 20
     - run: pip install -r requirements.txt
     - run: npm install
     - run: shellcheck deploy.sh