Fix Code of Conduct URL to use direct HTTPS link

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: emmanuelgjr

CONTRIBUTING.md

@@ -111,7 +111,7 @@ Same process as above, but no validation run needed. Documentation improvements
 
 ## Code of Conduct
 
-This initiative operates under the [OWASP Code of Conduct](https://owasp.org/www-policy/operational/code-of-conduct). We are committed to providing a welcoming and inclusive environment for everyone.
+This initiative operates under the [OWASP Code of Conduct](https://policy.owasp.org/operational/code-of-conduct). We are committed to providing a welcoming and inclusive environment for everyone.
 
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