add @gurgunday to fastify core team

[Uzlopak]

@fastify/leads

I think the effort of @gurgunday for the fastify core project is significant enough and we should add him to the core team.

[mcollina]

@Eomm @jsumners PTAL

[Eomm]

Yeah, totally agree!

[jsumners]

Agreed.

[gurgunday]

Funnily enough I was actually planning on making an official request after the v5 release, had a few more PRs in mind

Thank you for nominating me again, it's in large part thanks to you that I found my place here ♥️

[mcollina]

Done