fix(api): add missing confidential_note_events param to services api

doc/api/services.md

@@ -254,6 +254,7 @@ Parameters:
 | `merge_requests_events` | boolean | false | Enable notifications for merge request events |
 | `tag_push_events` | boolean | false | Enable notifications for tag push events |
 | `note_events` | boolean | false | Enable notifications for note events |
+| `confidential_note_events` | boolean | false | Enable notifications for confidential note events |
 | `pipeline_events` | boolean | false | Enable notifications for pipeline events |
 | `wiki_page_events` | boolean | false | Enable notifications for wiki page events |
 
@@ -524,6 +525,7 @@ Parameters:
 | `merge_requests_events` | boolean | false | Enable notifications for merge request events |
 | `tag_push_events` | boolean | false | Enable notifications for tag push events |
 | `note_events` | boolean | false | Enable notifications for note events |
+| `confidential_note_events` | boolean | false | Enable notifications for confidential note events |
 | `pipeline_events` | boolean | false | Enable notifications for pipeline events |
 | `wiki_page_events` | boolean | false | Enable notifications for wiki page events |
 
@@ -1132,6 +1134,7 @@ Parameters:
 | `merge_requests_events` | boolean | false | Enable notifications for merge request events |
 | `tag_push_events` | boolean | false | Enable notifications for tag push events |
 | `note_events` | boolean | false | Enable notifications for note events |
+| `confidential_note_events` | boolean | false | Enable notifications for confidential note events |
 | `pipeline_events` | boolean | false | Enable notifications for pipeline events |
 | `wiki_page_events` | boolean | false | Enable notifications for wiki page events |
 | `push_channel` | string | false | The name of the channel to receive push events notifications |
@@ -1139,6 +1142,7 @@ Parameters:
 | `confidential_issue_channel` | string | false | The name of the channel to receive confidential issues events notifications |
 | `merge_request_channel` | string | false | The name of the channel to receive merge request events notifications |
 | `note_channel` | string | false | The name of the channel to receive note events notifications |
+| `confidential_note_channel` | boolean | The name of the channel to receive confidential note events notifications |
 | `tag_push_channel` | string | false | The name of the channel to receive tag push events notifications |
 | `pipeline_channel` | string | false | The name of the channel to receive pipeline events notifications |
 | `wiki_page_channel` | string | false | The name of the channel to receive wiki page events notifications |

lib/api/helpers/services_helpers.rb

@@ -132,6 +132,12 @@ module API
             type: Boolean,
             desc: 'Enable notifications for note_events'
           },
+          {
+            required: false,
+            name: :confidential_note_events,
+            type: Boolean,
+            desc: 'Enable notifications for confidential_note_events'
+          },
           {
             required: false,
             name: :tag_push_events,