Fix 2 paths in the doctest list (#21314)

fix the list

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

Author: ydshieh

utils/documentation_tests.txt

@@ -108,8 +108,8 @@ src/transformers/models/longformer/modeling_tf_longformer.py
 src/transformers/models/longt5/modeling_longt5.py
 src/transformers/models/marian/modeling_marian.py
 src/transformers/models/markuplm/modeling_markuplm.py
-src/transformers/models/maskformer/configuration_mask2former.py
-src/transformers/models/maskformer/modeling_mask2former.py
+src/transformers/models/mask2former/configuration_mask2former.py
+src/transformers/models/mask2former/modeling_mask2former.py
 src/transformers/models/maskformer/configuration_maskformer.py
 src/transformers/models/maskformer/modeling_maskformer.py
 src/transformers/models/mbart/configuration_mbart.py