Fix corrupt symlink in retry.js introduced by #185 (#189)

PR #185 accidentally added a trailing newline to the retry.js symlink
target, causing GitHub Actions to fail with a "could not find file" error
when resolving the path at runtime.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: theletterf

docs-builder/preview/cleanup/scripts/retry.js

@@ -1 +1 @@
-../../../../scripts/retry.js
+../../../../scripts/retry.js