shared-config: add Terraform

Signed-off-by: Patrick Linnane <patrick@linnane.io>

Author: p-linnane

.github/actions/sync/shared-config.rb

@@ -83,6 +83,8 @@ def git(*args)
     "package.json"
   when "pip"
     "requirements.txt"
+  when "terraform"
+    ".terraform.lock.hcl"
   end
 
   keep_update = if ecosystem_file && (update_directories = update["directories"])