Update README.md

Author: novekm

outputs.tf

@@ -6,17 +6,22 @@ output "aws_current_region" {
 
 }
 output "amplify_app_id" {
-  value = aws_amplify_app.sample_app.id
+  value       = aws_amplify_app.sample_app.id
+  description = "The App ID for the Amplify App"
 }
 output "amplify_app_arn" {
-  value = aws_amplify_app.sample_app.arn
+  value       = aws_amplify_app.sample_app.arn
+  description = "The ARN for the Amplify App"
 }
 output "amplify_app_default_domain" {
-  value = aws_amplify_app.sample_app.default_domain
+  value       = aws_amplify_app.sample_app.default_domain
+  description = "The default domain for the Amplify App"
 }
 output "amplify_app_production_branch" {
-  value = aws_amplify_app.sample_app.default_domain
+  value       = aws_amplify_app.sample_app.default_domain
+  description = "The production branch for the Amplify App"
 }
 output "amplify_app_tags_all" {
-  value = aws_amplify_app.sample_app.tags_all
+  value       = aws_amplify_app.sample_app.tags_all
+  description = "All tags for the Amplify App"
 }