data_type fix

docs/level2.md

@@ -61,7 +61,7 @@ print(result) # result.data为list类型，包含2级数据文件记录列表
 
 ```python
 from csst_dfs_client import level2
-result = level2.update_qc2_status(level2_id='some_level2_id', data_type='SCI', qc2_status=1, batch_id='some_batch_id')
+result = level2.update_qc2_status(level2_id='some_level2_id', data_type='csst-msc-l2-mbi', qc2_status=1, batch_id='some_batch_id')
 print(result)
 ```
 
@@ -69,7 +69,7 @@ print(result)
 
 ```python
 from csst_dfs_client import level2
-result = level2.update_prc_status(level2_id='some_level2_id', data_type='SCI', prc_status=1, batch_id='some_batch_id')
+result = level2.update_prc_status(level2_id='some_level2_id', data_type='csst-msc-l2-mbi', prc_status=1, batch_id='some_batch_id')
 print(result)
 ```
 
@@ -82,7 +82,7 @@ from csst_dfs_client import level2
 local_file_path = '/path/to/your/level2_data.fits'
 module_id = 'MSC'
 level2_id = 'some_level2_id'
-file_type = 'SCI'
+data_type = 'csst-msc-l2-mbi-cat'
 file_name = 'level2_data.fits'
 dag_id = 'some_dag_id'
 build = 1
@@ -92,7 +92,7 @@ dataset = 'default_dataset'
 batch_id = 'default_batch_id'
 qc2_status = 0
 
-result = level2.write(local_file_path, module_id, level2_id, file_type, file_name, dag_id, build, level0_id, level1_id, dataset, batch_id, qc2_status)
+result = level2.write(local_file_path, module_id, level2_id, data_type, file_name, dag_id, build, level0_id, level1_id, dataset, batch_id, qc2_status)
 print(result)
 ```