Fix names

Author: francisco-videira-nhs

infrastructure/terraform/components/api/module_lambda_upsert_letter.tf

@@ -1,7 +1,7 @@
 module "upsert_letter" {
   source = "https://github.com/NHSDigital/nhs-notify-shared-modules/releases/download/v2.0.26/terraform-lambda.zip"
 
-  function_name = "upsert-letter"
+  function_name = "upsert_letter"
   description   = "Update or Insert the letter data in the letters table"
 
   aws_account_id = var.aws_account_id

lambdas/upsert-letter/src/index.ts

@@ -3,5 +3,5 @@ import createUpsertLetterHandler from "./handler/upsert-handler";
 
 const container = createDependenciesContainer();
 
-const upsertLetterHandler = createUpsertLetterHandler(container);
+export const upsertLetterHandler = createUpsertLetterHandler(container);
 export default upsertLetterHandler;