Merge pull request #11757 from hashicorp/backport/add-hcl-to-terminology/cleanly-composed-tadpole

This pull request was automerged via backport-assistant

website/content/docs/terminology.mdx

@@ -58,6 +58,7 @@ for quick referencing.
   image. They perform the major work of making the image contain useful
   software. Example provisioners include shell scripts, Chef, Puppet, etc.
 
-- `Templates` are JSON files which define one or more builds by configuring
-  the various components of Packer. Packer is able to read a template and use
-  that information to create multiple machine images in parallel.
+- `Templates` are either [HCL](templates/hcl_templates) or JSON files which
+  define one or more builds by configuring the various components of Packer.
+  Packer is able to read a template and use that information to create
+  multiple machine images in parallel.