docs: fix broken link

Author: jooola

docs/builders/hcloud.mdx

@@ -39,7 +39,7 @@ segmented below into two categories: required and optional parameters. Within
 each category, the available configuration keys are alphabetized.
 
 In addition to the options listed here, a
-[communicator](/packer/docs/templates/legacy_json_templates/communicator) can be configured for this
+[communicator](https://developer.hashicorp.com/packer/docs/communicators) can be configured for this
 builder.
 
 ### Required Builder Configuration options: