add fastify logo to landing page header section

[HassanBahati]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the feature has not already been requested

🚀 Feature Proposal

the fastify logo should be added to the landing page header section in place where we are having text Fastify as is at https://www.fastify.io/

Motivation

No response

Example

No response

[HassanBahati]

@Eomm from first sight i thought this didn't exist, but on inspecting, I realized it was a broken path

[HassanBahati]

@Eomm you may disregard this, its my fork that wasnt upto date