Fix api docs (#38882)

* update readme test=document_fix

* update conll05 docs

* update conll05 docs test=document_fix

python/paddle/text/datasets/conll05.py

@@ -300,9 +300,10 @@ class Conll05st(Dataset):
     
             .. code-block:: python
     
-            from paddle.text.datasets import Conll05st
-            conll05st = Conll05st()
-            word_dict, predicate_dict, label_dict = conll05st.get_dict()
+            	from paddle.text.datasets import Conll05st
+
+            	conll05st = Conll05st()
+            	word_dict, predicate_dict, label_dict = conll05st.get_dict()
         """
         return self.word_dict, self.predicate_dict, self.label_dict
 
@@ -314,8 +315,9 @@ class Conll05st(Dataset):
     
             .. code-block:: python
     
-            from paddle.text.datasets import Conll05st
-            conll05st = Conll05st()
-            emb_file = conll05st.get_embedding()
+            	from paddle.text.datasets import Conll05st
+
+            	conll05st = Conll05st()
+            	emb_file = conll05st.get_embedding()
         """
         return self.emb_file