Improve GitHub Actions (#3451)

.github/workflows/docs.yml

@@ -9,17 +9,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
-        with:
-          node-version: 12.x
-      - uses: actions/cache@v3
-        id: cache
-        with:
-          path: '**/node_modules'
-          key: npm-v2-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: npm-v2-
-      - run: npm ci
-        if: steps.cache.outputs.cache-hit != 'true'
+      - name: Set up environment
+        uses: ./.github/actions/setup
       - run: bash scripts/git-user-config.sh
       - run: node scripts/update-docs-branch.js
       - run: git push --all origin