Update Node.js version to 24 and remove pnpm version specification in CI workflow

Author: maehr

.github/workflows/awesome-lint.yml

@@ -11,12 +11,10 @@ jobs:
           fetch-depth: 0
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
-        with:
-          version: 10
       - name: Setup Node.js
         uses: actions/setup-node@v5
         with:
-          node-version: 20
+          node-version: 24
           cache: 'pnpm'
       - name: Install dependencies
         run: pnpm install --frozen-lockfile