feat: auto changelog action added and _example main.tf updated

Author: mamrajyadav

_example/memcached/example.tf

@@ -54,7 +54,7 @@ module "memcached" {
  engine = "memcached"
  engine_version = "1.5.10"
  family = "memcached1.5"
- parameter_group_name = "default.memcached1.5"
+ parameter_group_name = ""
  az_mode = "cross-az"
  port = 11211
  node_type = "cache.t2.micro"