refresh token typos

[eric-jahn]

https://github.com/hmis-api/authorization-service-api/blob/master/api-markup/api.oas3.yaml#L227

In case of renewing access token by using refresh token this parameter value should be
refresh_token. " instead of "In case of renewing access token by using refresh token this parameter value refrsh_token. "?

So there are two missing words and it seems like there is a missing "e" in refresh_token.