Fixed broken link (#247)

Resolves broken link to EC2 instance sizing.

Author: jackton1

README.md

@@ -70,7 +70,7 @@ infrastructure:
  - RDS (db.t3.small): $0.034 USD / hr
  - EC2 (t2.small): $0.023 USD / hr
 
-EC2 instance sizing can be configured in [terraform/environments/stage/main.tf](terraform/environments/stage/main.tf)
+EC2 instance sizing can be configured in [templates/terraform/environments/stage/main.tf](templates/terraform/environments/stage/main.tf)
 
 ## Other links
 Project board: [zenhub][zenhub-board]
@@ -85,4 +85,4 @@ Project board: [zenhub][zenhub-board]
 [aws-route53]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-register.html
 [zenhub-board]: https://app.zenhub.com/workspaces/commit-zero-5da8decc7046a60001c6db44/board?filterLogic=any&repos=203630543,247773730,257676371,258369081
 [sendgrid]: https://signup.sendgrid.com
-[sendgrid-apikey]: https://app.sendgrid.com/settings/api_keys
+[sendgrid-apikey]: https://app.sendgrid.com/settings/api_keys