Fix grammatical errors and typo in code

[Danyylka]

Fixed:

Changed "Commands must" to "Commands must be" for grammatical correctness.
Corrected "import { geSSLHubRpcClient" to "import { getSSLHubRpcClient" to fix the typo.
Why it's useful:
These changes fix grammatical errors and a typo, ensuring the code is syntactically correct and easier to read.

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PR-Codex overview

This PR focuses on correcting a typo in the documentation and updating a function name in the code.

Detailed summary

• In apps/hubble/www/docs/docs/cli.md, the phrase "Commands must invoked" was corrected to "Commands must be invoked".
• In packages/hub-nodejs/docs/Client.md, the function name geSSLHubRpcClient was updated to getSSLHubRpcClient.

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Name	Status	Preview	Comments	Updated (UTC)
hub-monorepo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 28, 2024 6:45pm

[Danyylka]

Hi team! Could someone please review and merge my pull request? Let me know if any changes are needed. Thanks!

@cryptobenkei @mboyle @vrypan