Fix Typo in the Postgres Query (Limit)

[marcandrelarochelle]

Summary

The Postgres query had 10 even if the results only shows 5 results, which corresponds to the re-written Clickhouse query.
Quick typo fix.

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/en/integrations/index.mdx

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