r/aws_lambda_function(doc): tidy vpc_config note formatting

Author: jar-b

website/docs/r/lambda_function.html.markdown

@@ -567,7 +567,7 @@ The following arguments are optional:
 
 ### vpc_config Configuration Block
 
-~> NOTE: If subnet_ids, security_group_ids and ipv6_allowed_for_dual_stack are empty then vpc_config is considered to be empty or unset.
+~> **NOTE:** If `subnet_ids`, `security_group_ids` and `ipv6_allowed_for_dual_stack` are empty then `vpc_config` is considered to be empty or unset.
 
 * `ipv6_allowed_for_dual_stack` - (Optional) Whether to allow outbound IPv6 traffic on VPC functions connected to dual-stack subnets. Default: `false`.
 * `security_group_ids` - (Required) List of security group IDs associated with the Lambda function.