[Doc] homepage 404

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### What issue do you find in Pulsar docs?

homepage 404 not found

### What is your suggestion?

any websites under pulsar.apache.org is 404, please check if the server works

### Any reference?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start by checking the reported homepage and other URLs under pulsar.apache.org, using the linked screenshot as context. Done means the affected documentation pages no longer return 404; the issue does not name repository files or tests to run.

Written by the indexing model from the issue text.