Switch link checker to lychee

Author: trask

.github/config/markdown-link-check-config.json

@@ -96,8 +96,8 @@ jobs:
           name: integration-test-results
           path: jmx-metrics/build/reports/tests/integrationTest
 
-  markdown-link-check:
-    uses: ./.github/workflows/reusable-markdown-link-check.yml
+  link-check:
+    uses: ./.github/workflows/reusable-link-check.yml
 
   markdown-lint-check:
     uses: ./.github/workflows/reusable-markdown-lint.yml
@@ -120,7 +120,7 @@ jobs:
     # and so would not short-circuit if used in the second-last position
     name: publish-snapshots${{ (github.ref_name != 'main' || github.repository != 'open-telemetry/opentelemetry-java-contrib') && ' (skipped)' || '' }}
     needs:
-      # intentionally not blocking snapshot publishing on markdown-link-check or misspell-check
+      # intentionally not blocking snapshot publishing on link-check or misspell-check
       - build
       - integration-test
     runs-on: ubuntu-latest

.github/scripts/markdown-link-check-with-retry.sh

@@ -0,0 +1,19 @@
+name: Reusable - Check links
+
+on:
+  workflow_call:
+
+jobs:
+  check-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: lycheeverse/lychee-action@v2
+        with:
+          # excluding links to pull requests and issues is done for performance
+          args: >
+            --include-fragments
+            --exclude "^https://github.com/open-telemetry/opentelemetry-java-instrumentation/(issue|pull)/\\d+$"
+            --max-retries 6
+            .