Create lychee GH issues only when action is failing

.github/workflows/lychee-weekly.yml

@@ -11,6 +11,7 @@ jobs:
         with:
           args: -v -n "*.md" "**/*.md"
       - name: Create Issue From File
+        if: env.lychee_exit_code != 0
         uses: peter-evans/[email protected]
         with:
           title: Link Checker Report