Fixing typos and grammar mistakes in tutorial.
Fixing typos and grammar mistakes in tutorial.

abdheshkumar/akka-http-service,rahulsinghai/akka-http-circe-geoip-heroku,ogeagla/akka-http-microservice,gustavopolitano/akka-http-microservice,charlesxucheng/akka-http-microservice,Alekseylv/microservice,everpeace/akka-http-microservice,agilemobiledev/akka-http-microservice,odd/akka-http-microservice,everpeace/akka-http-microservice,TimGraf/akka-http-microservice,muuki88/akka-http-elasticsearch,x1-/akka-http-microservice,exandas/tms-micro-seed,buildlackey/akka-http-microservice