⚠️ Security Release

• Fix https://github.com/fastify/fastify/security/advisories/GHSA-mrq3-vjjr-p77c CVE-2026-25224.

What's Changed

• docs: update Reply.send() documentation for string serialization by @mcollina in https://github.com/fastify/fastify/pull/6466
• chore: ignore agents config files by @mcollina in https://github.com/fastify/fastify/pull/6474
• docs: update vulnerability reporting to use GitHub Security by @mcollina in https://github.com/fastify/fastify/pull/6475

Full Changelog: https://github.com/fastify/fastify/compare/v5.7.2...v5.7.3