Replace usage of max/awesome-lint with manually installed awesome-lint.

max/awesome-lint uses outdated Node.js to build while the upstream awesome-lint requires newer Node.js. See max/awesome-lint#7.

.github/workflows/lint.yml

@@ -6,5 +6,8 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/[email protected]
-      - uses: max/[email protected]
+      - uses: actions/checkout@v4
+      - name: Install awesome-lint
+        run: npm install -g awesome-lint
+      - name: Run awesome-lint
+        run: npx awesome-lint ./README.md