Refine a paragraph of docker ps in Go and Python

[akiraaso]

Proposed changes

I changed a paragraph about docker ps in Node.js tutorial (#15839). It turns out there is the exactly same paragraph in Go and Python tutorial as well, so I propose to change them as well.

By the way, Java tutorial also has a similar paragraph, but not exactly. So I didn't change it in this PR.

Related issues (optional)

#15839

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[akiraaso]

Thank you for catching that. I've fixed them in the tutorials of Node.js, Go and Python.