fix: missing openapi schema change

public/openapi/read/admin/manage/categories/category_id/federation.yaml

@@ -36,6 +36,24 @@ get:
                         approved:
                           type: boolean
                           description: Whether the follow request has been accepted
+                  followers:
+                    type: array
+                    items:
+                      type: object
+                      properties:
+                        userslug:
+                          type: string
+                          description: An URL-safe variant of the username (i.e. lower-cased, spaces removed, etc.)
+                          example: dragon-fruit
+                        picture:
+                          type: string
+                          description: A URL pointing to a picture to be used as the user's avatar
+                          example: 'https://images.unsplash.com/photo-1560070094-e1f2ddec4337?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=256&h=256&q=80'
+                          nullable: true
+                        uid:
+                          type: number
+                          description: A user identifier
+                          example: 1
                   selectedCategory:
                     $ref: ../../../../../components/schemas/CategoryObject.yaml#/CategoryObject
               - $ref: ../../../../../components/schemas/CommonProps.yaml#/CommonProps