update for redisvl 0.9.1

[github-actions]

update for redisvl 0.9.1

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Note

Low Risk
Documentation-only typo fix across several API reference pages; no code or behavior changes.

Overview
Updates RedisVL 0.9.1 API docs (reranker.md, router.md, vectorizer.md) to fix spelling in the model_post_init description (“initialise” → “initialize”). No functional changes.

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[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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^{Security scan by Jit}