Update link-check.yml

Author: rly

.github/workflows/link-check.yml

@@ -19,4 +19,4 @@ jobs:
         id: lychee
         uses: lycheeverse/lychee-action@v2
         with:
-          args: --verbose --no-progress './content/**/*.md' './content/**/*.html' './content/**/*.rst' --user-agent "curl/8.4.0"
+          args: --verbose --no-progress './content/**/*.md' './content/**/*.html' './content/**/*.rst' --insecure