[i18n-ar] Translated file: docs/source/ar/tasks/masked_language_modeling.md into Arabic (#35198)

* إضافة الترجمة العربية: masked_language_modeling.md

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update docs/source/ar/tasks/masked_language_modeling.md

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

* Update _toctree.yml

* Update _toctree.yml

* Add language_modeling.md

* Add Sequence_classifiation.md

* Update _toctree.yml

---------

Co-authored-by: Abdullah Mohammed <554032+abodacs@users.noreply.github.com>

docs/source/ar/_toctree.yml

@@ -33,16 +33,16 @@
 - sections:
   - isExpanded: false
     sections:
-#     - local: tasks/sequence_classification
-#       title: تصنيف النصوص
+    - local: tasks/sequence_classification
+      title: تصنيف النصوص
     - local: tasks/token_classification
       title: تصنيف الرموز
     - local: tasks/question_answering
       title: الإجابة على الأسئلة
-#     - local: tasks/language_modeling
-#       title: نمذجة اللغة السببية
-#     - local: tasks/masked_language_modeling
-#       title: نمذجة اللغة المقنعة
+    - local: tasks/language_modeling
+      title: نمذجة اللغة السببية
+    - local: tasks/masked_language_modeling
+      title: نمذجة اللغة المقنعة
     - local: tasks/translation
       title: الترجمة
     - local: tasks/summarization