update API doc

doc/api/projects.md

@@ -32,6 +32,7 @@ Parameters:
 - `order_by` (optional) - Return requests ordered by `id`, `name`, `path`, `created_at`, `updated_at` or `last_activity_at` fields. Default is `created_at`
 - `sort` (optional) - Return requests sorted in `asc` or `desc` order. Default is `desc`
 - `search` (optional) - Return list of authorized projects according to a search criteria
+- `ci_enabled_first` - Return projects ordered by ci_enabled flag. Projects with enabled GitLab CI go first
 
 ```json
 [
@@ -134,6 +135,7 @@ Parameters:
 - `order_by` (optional) - Return requests ordered by `id`, `name`, `path`, `created_at`, `updated_at` or `last_activity_at` fields. Default is `created_at`
 - `sort` (optional) - Return requests sorted in `asc` or `desc` order. Default is `desc`
 - `search` (optional) - Return list of authorized projects according to a search criteria
+- `ci_enabled_first` - Return projects ordered by ci_enabled flag. Projects with enabled GitLab CI go first
 
 ### List ALL projects
 
@@ -149,6 +151,7 @@ Parameters:
 - `order_by` (optional) - Return requests ordered by `id`, `name`, `path`, `created_at`, `updated_at` or `last_activity_at` fields. Default is `created_at`
 - `sort` (optional) - Return requests sorted in `asc` or `desc` order. Default is `desc`
 - `search` (optional) - Return list of authorized projects according to a search criteria
+- `ci_enabled_first` - Return projects ordered by ci_enabled flag. Projects with enabled GitLab CI go first
 
 ### Get single project