docs(main.tf): add line break for better readability

A line break was added after the initial comment in the main.tf file to improve readability and make the file easier to understand.

terraform/main.tf

@@ -1,4 +1,5 @@
 /*
 This terraform plan will create a fortigate VM in azure without any public ip address.
+
 Adjust settings in variables.tf
 */