fix!: fix typo in HTTPGatewayRouter class name

[achingbrain]

Gatway -> Gateway

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works

[achingbrain]

Ah, the typo is in the exported interface name as well 🤦

export interface HTTPGatwayRouterInit {

[2color]

Ah, the typo is in the exported interface name as well 🤦

export interface HTTPGatwayRouterInit {

So fixing that would technically be a breaking change, requiring a major bump?