Commit docs changes

docs/resources/deployment.md

@@ -110,7 +110,7 @@ resource "vercel_deployment" "prebuilt_example" {
 - `path_prefix` (String) If specified then the `path_prefix` will be stripped from the start of file paths as they are uploaded to Vercel. If this is omitted, then any leading `../`s will be stripped.
 - `production` (Boolean) true if the deployment is a production deployment, meaning production aliases will be assigned.
 - `project_settings` (Attributes) Project settings that will be applied to the deployment. (see [below for nested schema](#nestedatt--project_settings))
-- `ref` (String) The branch or commit hash that should be deployed. Note this will only work if the project is configured to use a Git repository. Required if `ref` is not set.
+- `ref` (String) The branch or commit hash that should be deployed. Note this will only work if the project is configured to use a Git repository. Required if `files` is not set.
 - `team_id` (String) The team ID to add the deployment to. Required when configuring a team resource if a default team has not been set in the provider.
 
 ### Read-Only