5.12.1

⚠️ Security release

• Fix for https://github.com/fastify/fastify/security/advisories/GHSA-w2qp-rph6-63g4
• Fix for https://github.com/fastify/fastify/security/advisories/GHSA-3m5p-2c4r-xxw2

What's Changed

• [Backport 5.x] test: fix reply.mediaType by @github-actions[bot] in https://github.com/fastify/fastify/pull/6950
• [Backport 5.x] ci: allow backport in pr title by @github-actions[bot] in https://github.com/fastify/fastify/pull/6952
• [Backport 5.x] fix: run preClose hook exactly once per declaring instance by @github-actions[bot] in https://github.com/fastify/fastify/pull/6954
• [Backport 5.x] fix: report canonical route url for hidden prefix slash route by @github-actions[bot] in https://github.com/fastify/fastify/pull/6961

Full Changelog: https://github.com/fastify/fastify/compare/v5.12.0...v5.12.1