enable reporting of errors as an issue

Author: mmcky

.github/workflows/linkcheck.yml

@@ -18,6 +18,7 @@ jobs:
         id: lychee
         uses: lycheeverse/lychee-action@v2
         with:
+          fail: false
           args: --accept 403 lectures/*.md
       - name: Create Issue From File
         if: steps.lychee.outputs.exit_code != 0