soften language around legacy for now

website/content/docs/templates/index.mdx

@@ -18,11 +18,11 @@ functions to help you customize your builds.
 Historically, Packer has used a JSON template for its configuration, but Packer
 is transitioning to a new template configuration format that uses HCL2 -- the
 same configuration language used by Terraform and HashiCorp's other products.
-This format is more flexible, more modular, and more concise than the legacy
-JSON template format. While the legacy JSON format is still supported, certain
+This format is more flexible, more modular, and more concise than the original
+JSON template format. While the JSON format is still supported, certain
 new features in the Packer core will only be implemented for the newer HCL
 format. Please use the side bar to find documentation for the different
 template formats.
 
-If you need help upgrading a legacy JSON template to an HCL template, check
+If you need help upgrading a JSON template to an HCL template, check
 our upgrade guide [here](/guides/hcl/from-json-v1).