ELI-597: Adds escape character for email formatting (#547)

Author: shweta-nhs

infrastructure/stacks/api-layer/step_functions.tf

@@ -106,9 +106,10 @@ INSTRUCTIONS:
 2. Ensure the new hashes are working as expected.
 3. Run the command below to approve and resume the workflow:
 
-aws stepfunctions send-task-success --task-token $$.Task.Token --task-output {{}}
+aws stepfunctions send-task-success --task-token {} --task-output \\{\\}
 
 ======================================================
+', $$.Task.Token)
 EOT
 
   delete_jobs_message = <<EOT
@@ -127,9 +128,10 @@ INSTRUCTIONS:
 2. Ensure the old hashes have been removed successfully.
 3. Run the command below to approve and resume the workflow:
 
-aws stepfunctions send-task-success --task-token $$.Task.Token --task-output {{}}
+aws stepfunctions send-task-success --task-token {} --task-output \\{\\}
 
 ======================================================
+', $$.Task.Token)
 EOT
 
   failure_message = <<EOT