Update mint update docs

[lawreka]

Documentation changes

This PR removes the difference between CLI and client in our docs, since customers don't know/care that we package the client in the CLI under the hood. Running mint update updates both. It also moves the troubleshooting command to re-install the CLI at the latest version locally up the page with the code group that has npm/yarn/pnpm versions of the command.

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For Reviewers

When reviewing documentation PRs, please consider:

✅ Technical accuracy

• Code examples work as written
• Commands and configurations are correct
• Links resolve to the right destinations
• Prerequisites and requirements are accurate

✅ Clarity and completeness

• Instructions are clear and easy to follow
• Steps are in logical order
• Nothing important is missing
• Examples help illustrate the concepts

✅ User experience

• A new user could follow these docs successfully
• Common gotchas or edge cases are addressed
• Error messages or troubleshooting guidance is helpful

[ethanpalm]