Update pipeline tag and add link to GitHub repository

This PR updates the pipeline tag to `question-answering` and adds a link to the GitHub repository.

README.md

@@ -2,13 +2,13 @@
 language:
 - vi
 library_name: transformers
+license: mit
+pipeline_tag: question-answering
 tags:
 - SemViQA
 - question-answering
 - fact-checking
 - information-retrieval
-pipeline_tag: token-classification
-license: mit
 ---
 
 # SemViQA-QATC: Vietnamese Question Answering Token Classifier
@@ -111,4 +111,4 @@ If you use **SemViQA-QATC** in your research, please cite:
 *Built by Dien X. Tran*
 [![LinkedIn](https://img.shields.io/badge/LinkedIn-Profile-blue?logo=linkedin)](https://www.linkedin.com/in/xndien2004/)
 For more details, visit the project repository.
-[![GitHub stars](https://img.shields.io/github/stars/DAVID-NGUYEN-S16/SemViQA?style=social)](https://github.com/DAVID-NGUYEN-S16/SemViQA)
+[![GitHub stars](https://img.shields.io/github/stars/DAVID-NGUYEN-S16/SemViQA?style=social)](https://github.com/DAVID-NGUYEN-S16/SemViQA)