docs: fix error links

[QuakeWang]

This link for getting started with docker has moved to https://www.docker.com/get-started/ .

Then some links in the document use relative paths, but cannot be accessed normally in GitHub, so add '...` prefix.

[nicecui]

Thank you very much for your contribution! Your help ensures that the Docker link will be correct.

However, it may not be necessary to make changes to relative paths. We use paths like /user-guide or /reference to reduce errors in internal hierarchical documentation. For example, it is easy to make mistakes when writing links to reference at /user-guide/clients/sdk/go.md, that would be ../../../reference/xxx.md. In contrast, we can write /reference/xxx.md, which is simpler and less prone to errors.

We hope that all links will be recognized correctly on GitHub. However, our main priority is to publish the repository to https://docs.greptime.com without errors, with minimal need for considering link corrections. To achieve this, we require that all documents follow the same specification. Therefore, links to resource root directories in all documents should be written as /reference, /user-guide, and so on.

Thank you for your understanding and contribution! Expecting the modified PR.

[QuakeWang]

OK, got it. I will update it later : )

[QuakeWang]

@nicecui PTAL

[nicecui]

👍