message: docs: add documentation for record.updateRecords
diff: - [updateRecord](#updateRecord)
  - [getRecords](#getRecords)
  - [addRecords](#addRecords)
  +- [updateRecords](#updateRecords)
  - [createCursor](#createCursor)
  - [getRecordsByCursor](#getRecordsByCursor)
  - [deleteCursor](#deleteCursor)
  @@ -145,6 +146,35 @@ Adds multiple records to an App.
  - https://developer.kintone.io/hc/en-us/articles/360000313321
  +### updateRecords
  +
  +Updates details of multiple records in an App, by specifying their record numbers, or their unique keys.
  +
  +#### Parameters
  +
  +| Name | Type | Required | Description |
  +| ------------------------- | :--------------: | :-------------------------: | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  +| app | Number or String | Yes | The App ID. |
  +| records | Array | Yes | Holds an array of objects that include `id`/`updateKey`, `revision` and `record` objects. |
  +| records[].id | Number or String | Conditionally<br />Required | The Record ID of the record to be updated. Required, if `updateKey` will not be specified. |
  +| records[].updateKey | Object | Conditionally<br />Required | The unique key of the record to be updated. Required, if `id` will not be specified. To specify this field, the field must have the "Prohibit duplicate values" option turned on. |
  +| records[].updateKey.field | String | Conditionally<br />Required | The field code of the unique key. Required, if `updateKey` will be specified. |
  +| records[].updateKey.value | Number or String | Conditionally<br />Required | The value of the unique key. Required, if `updateKey` will be specified. |
  +| records[].revision | Number or String | | The expected revision number. If the value does not match, an error will occur and all records will not be updated. If the value is not specified or is -1, the revision number will not be checked. |
  +| records[].record | Object | | Field codes and values are specified in this object. If ignored, the record will not be updated. For field type specs, check the [Field Types](https://developer.kintone.io/hc/en-us/articles/212494818/) page. |
  +
  +#### Returns
  +
  +| Name | Type | Description |
  +| ------------------ | :----: | ------------------------------------------------------------------------------ |
  +| records | Array | Holds an array of objects that include `id` and `revision` of updated records. |
  +| records[].id | String | The ID of the record. |
  +| records[].revision | String | The revision number of the record. |
  +
  +#### Reference
  +
  +- https://developer.kintone.io/hc/en-us/articles/360000313622
  +
  ### createCursor
  Adds a cursor so that large amount of records can be obtained from an App.
  