Readme cleanup toc

.github/workflows/ci.yml

@@ -12,16 +12,26 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: "3.0"
-          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
-      - name: Install gem
-        run: gem install awesome_bot
       - name: Check links
-        run: |
-          awesome_bot README.md --allow-dupe -w robotframework.org,linkedin.com,theseus.fi
+        # Using lychee (not awesome_bot) because it can authenticate GitHub
+        # link checks with GITHUB_TOKEN via the GitHub API, instead of
+        # scraping github.com HTML pages. The latter got its connections
+        # reset/rate-limited from GitHub Actions IPs regardless of request
+        # pacing, which awesome_bot has no way to authenticate around.
+        uses: lycheeverse/lychee-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          args: >-
+            --no-progress
+            --accept "200..=204,429,503"
+            --max-retries 3
+            --retry-wait-time 5
+            --exclude robotframework.org
+            --exclude linkedin.com
+            --exclude theseus.fi
+            README.md
+          fail: true
       - name: Check awesome-list conventions
         # Informational only: the list intentionally keeps some conventions
         # awesome-lint disagrees with (back-to-top links, repeated domain