Update docs

Author: SharaevN

docs/data-sources/project_milestone.md

@@ -37,16 +37,13 @@ data "gitlab_project_milestone" "example" {
 - `milestone_id` (Number) The instance-wide ID of the project’s milestone.
 - `project_id` (String) The ID or URL-encoded path of the project owned by the authenticated user.
 
-### Optional
-
-- `id` (String) The ID of this resource.
-
 ### Read-Only
 
 - `created_at` (String) The time of creation of the milestone. Date time string, ISO 8601 formatted, for example 2016-03-11T03:45:40Z.
 - `description` (String) The description of the milestone.
 - `due_date` (String) The due date of the milestone. Date time string in the format YYYY-MM-DD, for example 2016-03-11.
 - `expired` (Boolean) Bool, true if milestore expired.
+- `id` (String) The ID of this resource.
 - `iid` (Number) The ID of the project's milestone.
 - `start_date` (String) The start date of the milestone. Date time string in the format YYYY-MM-DD, for example 2016-03-11.
 - `state` (String) The state of the milestone. Valid values are: `active`, `closed`.

docs/data-sources/project_milestones.md

@@ -36,7 +36,6 @@ data "gitlab_project_milestones" "example" {
 
 ### Optional
 
-- `id` (String) The ID of this resource.
 - `iids` (List of Number) Return only the milestones having the given `iid` (Note: ignored if `include_parent_milestones` is set as `true`).
 - `include_parent_milestones` (Boolean) Include group milestones from parent group and its ancestors. Introduced in GitLab 13.4.
 - `search` (String) Return only milestones with a title or description matching the provided string.
@@ -45,6 +44,7 @@ data "gitlab_project_milestones" "example" {
 
 ### Read-Only
 
+- `id` (String) The ID of this resource.
 - `milestones` (List of Object) List of milestones from a project. (see [below for nested schema](#nestedatt--milestones))
 
 <a id="nestedatt--milestones"></a>

docs/resources/project_milestone.md

@@ -42,14 +42,14 @@ resource "gitlab_project_milestone" "example" {
 - `created_at` (String) The time of creation of the milestone. Date time string, ISO 8601 formatted, for example 2016-03-11T03:45:40Z.
 - `description` (String) The description of the milestone.
 - `due_date` (String) The due date of the milestone. Date time string in the format YYYY-MM-DD, for example 2016-03-11.
-- `id` (String) The ID of this resource.
 - `start_date` (String) The start date of the milestone. Date time string in the format YYYY-MM-DD, for example 2016-03-11.
 - `state` (String) The state of the milestone. Valid values are: `active`, `closed`.
 - `updated_at` (String) The last update time of the milestone. Date time string, ISO 8601 formatted, for example 2016-03-11T03:45:40Z.
 
 ### Read-Only
 
 - `expired` (Boolean) Bool, true if milestore expired.
+- `id` (String) The ID of this resource.
 - `iid` (Number) The ID of the project's milestone.
 - `milestone_id` (Number) The instance-wide ID of the project’s milestone.
 - `web_url` (String) The web URL of the milestone.