Debug TiDB Cloud Documentation: Connect to TiDB with Navicat

This issue is a sub-issue of Debug TiDB Cloud Documentation: Summary Issue · Issue #15480 · pingcap/docs. The purpose of this sub-issue is to verify and debug the Connect to TiDB with Navicat document.

You can follow the instructions provided in #15480 to verify and debug the instructions in this document.

1. After finishing your verification, please add your verification result to this sub-issue as a comment. The result can be the issues you encounter, the mistakes you find, or any other findings. If everything looks fine, you can also add it as a comment.
2. For any issues you found during the verification, welcome to create a pull request (PR) to fix them directly. In the pull request, please indicate which issue this PR resolves in the PR description (for example, fix #16035). To learn how to create a pull request, see TiDB Documentation Contributing Guide.

Your contribution to testing and verifying the documentation is highly appreciated!

Start with the linked “Connect to TiDB with Navicat” document and follow the verification instructions in issue #15480; use CONTRIBUTING.md for pull request guidance. Verify each instruction, record the result in a comment on this issue, and submit a PR for any problems found, referencing #16035.