docs: Fix broken link in default VPC example readme (#827)

Fix broken link in readme

examples/manage-default-vpc/README.md

@@ -2,7 +2,7 @@
 
 Configuration in this directory does not create new VPC resources, but it adopts [Default VPC](https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/default-vpc.html) created by AWS to allow management of it using Terraform.
 
-This is not usual type of resource in Terraform, so use it carefully. More information is [here](https://www.terraform.io/docs/providers/aws/r/default_vpc.html).
+This is not usual type of resource in Terraform, so use it carefully. More information is [here](https://www.terraform.io/docs/providers/aws/r/default_vpc).
 
 ## Usage