Add parameters in project creation API docs

This adds missing parameters to make the POST /projects/user/:user_id
API calls consistent with the POST POST /projects call.

doc/api/projects.md

@@ -931,9 +931,13 @@ POST /projects
 | `auto_devops_deploy_strategy` | string | no | Auto Deploy strategy (`continuous`, `manual` or `timed_incremental`) |
 | `repository_storage` | string | no | **(STARTER ONLY)** Which storage shard the repository is on. Available only to admins |
 | `approvals_before_merge` | integer | no | **(STARTER)** How many approvers should approve merge requests by default |
+| `external_authorization_classification_label` | string | no | **(PREMIUM)** The classification label for the project |
 | `mirror` | boolean | no | **(STARTER)** Enables pull mirroring in a project |
 | `mirror_trigger_builds` | boolean | no | **(STARTER)** Pull mirroring triggers builds |
 | `initialize_with_readme` | boolean | no | `false` by default |
+| `template_name` | string | no | When used without `use_custom_template`, name of a [built-in project template](../gitlab-basics/create-project.md#built-in-templates). When used with `use_custom_template`, name of a custom project template |
+| `use_custom_template` | boolean | no | **(PREMIUM)** Use either custom [instance](../user/admin_area/custom_project_templates.md) or [group](../user/group/custom_project_templates.md) (with `group_with_project_templates_id`) project template |
+| `group_with_project_templates_id` | integer | no | **(PREMIUM)** For group-level custom templates, specifies ID of group from which all the custom project templates are sourced. Leave empty for instance-level templates. Requires `use_custom_template` to be true |
 
 NOTE: **Note:** If your HTTP repository is not publicly accessible,
 add authentication information to the URL: `https://username:password@gitlab.company.com/group/project.git`
@@ -991,6 +995,7 @@ POST /projects/user/:user_id
 | `external_authorization_classification_label` | string | no | **(PREMIUM)** The classification label for the project |
 | `mirror` | boolean | no | **(STARTER)** Enables pull mirroring in a project |
 | `mirror_trigger_builds` | boolean | no | **(STARTER)** Pull mirroring triggers builds |
+| `initialize_with_readme` | boolean | no | `false` by default |
 | `template_name` | string | no | When used without `use_custom_template`, name of a [built-in project template](../gitlab-basics/create-project.md#built-in-templates). When used with `use_custom_template`, name of a custom project template |
 | `use_custom_template` | boolean | no | **(PREMIUM)** Use either custom [instance](../user/admin_area/custom_project_templates.md) or [group](../user/group/custom_project_templates.md) (with `group_with_project_templates_id`) project template |
 | `group_with_project_templates_id` | integer | no | **(PREMIUM)** For group-level custom templates, specifies ID of group from which all the custom project templates are sourced. Leave empty for instance-level templates. Requires `use_custom_template` to be true |