Exclude x.com from lychee check

lefthook.yml

@@ -14,4 +14,4 @@ pre-push:
   commands:
     check-links:
       tags: docs
-      run: command -v lychee && lychee docs README.md CHANGELOG.md --exclude localhost --exclude twitter.com --exclude-path docs/index.html
+      run: command -v lychee && lychee docs README.md CHANGELOG.md --exclude localhost --exclude twitter.com --exclude x.com --exclude-path docs/index.html