chore: rm fastify-telegraf from doc example
chore: rm fastify-telegraf from doc example

Ref: https://github.com/telegraf/telegraf/pull/1472

Co-authored-by: SMAZNet <43f39f36696c1690c135435c9fe0db4ea16c1dae@gmail.com>
Signed-off-by: Muthu Kumar <5dad8f8965e269bd75dab2af1e682d5b51633126@thefeathers.in>

telegraf/telegraf,telegraf/telegraf