chore: Clean up write_turbopuffer guide

[desmondcheongzx]

Changes Made

1. Fix typo
2. Add proper links in example

[greptile-apps]

Greptile Summary

This PR makes a minor correction to the Turbopuffer integration documentation. The change fixes a typo in the configuration example by updating the namespace value from 'daft-tpuf-example2' to 'daft-tpuf-example', removing what appears to be an unintended '2' suffix.

The modification is contained within the Turbopuffer connector documentation file (docs/connectors/turbopuffer.md) and specifically affects line 33 where the namespace configuration is demonstrated. This change standardizes the example naming convention and improves documentation consistency without impacting any functional code or behavior. The Turbopuffer connector allows users to write data from Daft DataFrames to Turbopuffer vector databases, and this documentation provides users with configuration examples for establishing connections.

Confidence score: 5/5

• This PR is extremely safe to merge with no risk of production issues
• Score reflects that this is purely a documentation typo fix with no functional impact
• No files require special attention as this is a single-line documentation change

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