docs: fix pool configuration grammar

[Rohan5commit]

Summary

• Change it's configuration to its configuration in the pool docs.

Related issue

• N/A

Guideline alignment

• Read the contribution guide where present and kept this to one focused text-only file change.
• No behavior, test, fixture, changelog, or generated-file changes.

Validation

• git diff --check
• Not run: broader tests are unnecessary for this text-only change.

AI assistance

• Prepared with Codex and reviewed before submission.

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Note

Low Risk
Documentation-only grammar fix with no code or behavior changes, so risk is negligible.

Overview
Fixes a small grammar typo in docs/pool.md by changing “reusing it's configuration” to “reusing its configuration” in the pool creation example text.

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[Copilot]

Pull request overview

Fixes a grammatical error in the Redis client pool documentation by correcting the possessive form in a sentence describing pool creation from an existing client.

Changes:

• Replace “it’s configuration” with the correct possessive “its configuration” in docs/pool.md.

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