[Doctest] Fixing doctest `configuration_pegasus_x.py` (#19725)

* Fixed pegasus_x config doctest

* Test commit
Co-authored-by: mukesh663 <mukesh13034@gmail.com>

src/transformers/models/pegasus_x/configuration_pegasus_x.py

@@ -94,12 +94,12 @@ class PegasusXConfig(PretrainedConfig):
     Example:
 
     ```python
-    >>> from transformers import PegasusXModel, PegasusXConfig
+    >>> from transformers import PegasusXConfig, PegasusXModel
 
     >>> # Initializing a PEGASUS google/pegasus-x-large style configuration
     >>> configuration = PegasusXConfig()
 
-    >>> # Initializing a model from the google/pegasus-x-large style configuration
+    >>> # Initializing a model (with random weights) from the google/pegasus-x-large style configuration
     >>> model = PegasusXModel(configuration)
 
     >>> # Accessing the model configuration

utils/documentation_tests.txt

@@ -92,6 +92,7 @@ src/transformers/models/opt/modeling_tf_opt.py
 src/transformers/models/owlvit/modeling_owlvit.py
 src/transformers/models/pegasus/configuration_pegasus.py
 src/transformers/models/pegasus/modeling_pegasus.py
+src/transformers/models/pegasus_x/configuration_pegasus_x.py
 src/transformers/models/perceiver/modeling_perceiver.py
 src/transformers/models/plbart/modeling_plbart.py
 src/transformers/models/poolformer/modeling_poolformer.py