Feature request template links to missing Contributing anchor

What is the issue?

The feature request issue template links to:

https://github.com/openai/codex#contributing

That anchor does not exist in the README. The repository's actual contribution guidance lives at:

https://github.com/openai/codex/blob/main/docs/contributing.md

This can confuse users who are trying to understand the contribution process before opening a feature request.

I have a small local patch ready that updates the link to docs/contributing.md if maintainers think this is worth changing.

Where did you find it?

https://github.com/openai/codex/blob/main/.github/ISSUE_TEMPLATE/5-feature-request.yml

The link appears in the "Before you submit a feature" markdown text.