docs: fix scan iterator example pattern

[Rohan5commit]

Description

Fix the scan iterator example to use pattern* instead of patter* in the README.

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Checklist

• Does npm test pass with this change (including linting)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

Validation

• Ran git diff --check

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Note

Low Risk
Documentation-only change correcting a typo in the scanIterator example; no runtime behavior is affected.

Overview
Fixes a typo in the README scanIterator options example by correcting the MATCH glob from patter* to pattern*, so the docs show a valid key pattern.

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[Copilot]

Pull request overview

Updates the README scan iterator example to use the correct MATCH glob pattern, ensuring the documented usage matches intended Redis SCAN semantics.

Changes:

• Fix typo in the client.scanIterator example: MATCH: "patter*" → MATCH: "pattern*".

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