Add table-question-answering task category

This PR adds the `table-question-answering` task category so that the dataset can be more easily found on the hub.

README.md

@@ -9,6 +9,7 @@ size_categories:
 task_categories:
 - question-answering
 - multiple-choice
+- table-question-answering
 pretty_name: 'FAMMA: A Benchmark for Financial Domain Multilingual Multimodal Question
   Answering'
 tags:
@@ -100,6 +101,7 @@ configs:
   - split: release_livepro_txt
     path: data/release_livepro_txt-*
 ---
+
 ## Introduction