chore(deps): update dependency fastify to v4.19.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
fastify (source)	4.19.0 -> 4.19.1

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Release Notes

fastify/fastify (fastify)

### [`v4.19.1`](https://togithub.com/fastify/fastify/releases/tag/v4.19.1) [Compare Source](https://togithub.com/fastify/fastify/compare/v4.19.0...v4.19.1) #### What's Changed - docs(typescript): fix typo by [@​jon-codes](https://togithub.com/jon-codes) in [https://github.com/fastify/fastify/pull/4861](https://togithub.com/fastify/fastify/pull/4861) - docs(testing): add plugin testing guide by [@​Ekott2006](https://togithub.com/Ekott2006) in [https://github.com/fastify/fastify/pull/4849](https://togithub.com/fastify/fastify/pull/4849) - docs: fix platformatic-cloud anchor id by [@​sher](https://togithub.com/sher) in [https://github.com/fastify/fastify/pull/4863](https://togithub.com/fastify/fastify/pull/4863) - fix: Type narrow fix issue from PR [#​4823](https://togithub.com/fastify/fastify/issues/4823) by [@​aadito123](https://togithub.com/aadito123) in [https://github.com/fastify/fastify/pull/4869](https://togithub.com/fastify/fastify/pull/4869) #### New Contributors - [@​jon-codes](https://togithub.com/jon-codes) made their first contribution in [https://github.com/fastify/fastify/pull/4861](https://togithub.com/fastify/fastify/pull/4861) - [@​sher](https://togithub.com/sher) made their first contribution in [https://github.com/fastify/fastify/pull/4863](https://togithub.com/fastify/fastify/pull/4863) **Full Changelog**: https://github.com/fastify/fastify/compare/v4.19.0...v4.19.1

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