[Doctest] fix doc test for megatron bert (#19600)

src/transformers/models/megatron_bert/configuration_megatron_bert.py

@@ -77,12 +77,12 @@ class MegatronBertConfig(PretrainedConfig):
     Examples:
 
     ```python
-    >>> from transformers import MegatronBertModel, MegatronBertConfig
+    >>> from transformers import MegatronBertConfig, MegatronBertModel
 
     >>> # Initializing a MEGATRON_BERT bert-base-uncased style configuration
     >>> configuration = MegatronBertConfig()
 
-    >>> # Initializing a model from the bert-base-uncased style configuration
+    >>> # Initializing a model (with random weights) from the bert-base-uncased style configuration
     >>> model = MegatronBertModel(configuration)
 
     >>> # Accessing the model configuration

utils/documentation_tests.txt

@@ -68,6 +68,7 @@ src/transformers/models/longt5/modeling_longt5.py
 src/transformers/models/marian/modeling_marian.py
 src/transformers/models/markuplm/modeling_markuplm.py
 src/transformers/models/mbart/modeling_mbart.py
+src/transformers/models/megatron_bert/configuration_megatron_bert.py 
 src/transformers/models/mobilebert/configuration_mobilebert.py
 src/transformers/models/mobilebert/modeling_mobilebert.py
 src/transformers/models/mobilebert/modeling_tf_mobilebert.py