Update partial_member_list schema to require user_id objects across OpenAPI docs (#623)

ja/api-reference/openapi_knowledge.json

@@ -2321,9 +2321,18 @@
           },
           "partial_member_list": {
             "type": "array",
-            "description": "'partial_members'権限のメンバーIDリスト。",
+            "description": "'partial_members'権限でアクセスできるメンバーのリスト。",
             "items": {
-              "type": "string"
+              "type": "object",
+              "required": [
+                "user_id"
+              ],
+              "properties": {
+                "user_id": {
+                  "type": "string",
+                  "description": "メンバーのユーザーID。"
+                }
+              }
             }
           }
         }
@@ -2936,4 +2945,4 @@
       }
     }
   }
-}
+}