Perf improvement: fortunes_fasthttp

[pr-benchmarks]

Scenario	Environment	Date	Old RPS	New RPS	Change	Deviation	StDev	Dependencies
fortunes_fasthttp [Fixed]	Go Fortunes aspnet-citrine-lin	05/14/2021 23:18:55	444,118	456,742	2.84 % (12,624) 👍	3.72 σ	3,389.93	Changes Name Version Diff

@sebastienros