Add HTTP/2 Protocol Support for API Specs

[farisashai]

curl and Go are the only two languages that natively support HTTP/2 automatically in the default API spec list so all other code examples are failing out of the box. Our API fails if its not over HTTP/2 so would be great if the docs could generate compatible code snippets - and run over HTTP/2 in the interactive playground

https://docs.joinformal.com/api-reference/corev1connectorservice/createconnector