docs: fix API key mismatch in documentation and raw guardrail JSON

[harshitkumar454]

Fix: Incorrect key for regex pattern in documentation

Summary

This PR fixes an incorrect key used for passing regex patterns in the documentation.

Issue

While following the documentation, I used the regex key to pass a regex pattern. However, this did not work as expected.

Root Cause

After testing with the Python SDK and verifying with the backend, it was confirmed that:

• The correct key to use is rule
• The documented key regex is incorrect

Fix

• Updated the documentation to replace regex with rule for regex pattern usage

Validation

• Verified the behavior using the Python SDK
• Confirmed correctness with backend implementation

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Project	Status	Preview	Updated (UTC)
portkey-docs	🟢 Ready	View Preview	Apr 1, 2026, 10:29 AM