Add citation information

README.md

@@ -253,4 +253,14 @@ Our multitask model demonstrates comparable performance on different zero-shot b
 
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+
+### Citation:
+@misc{stepanov2024gliner,
+      title={GLiNER multi-task: Generalist Lightweight Model for Various Information Extraction Tasks}, 
+      author={Ihor Stepanov and Mykhailo Shtopko},
+      year={2024},
+      eprint={2406.12925},
+      archivePrefix={arXiv},
+      primaryClass={id='cs.LG' full_name='Machine Learning' is_active=True alt_name=None in_archive='cs' is_general=False description='Papers on all aspects of machine learning research (supervised, unsupervised, reinforcement learning, bandit problems, and so on) including also robustness, explanation, fairness, and methodology. cs.LG is also an appropriate primary category for applications of machine learning methods.'}
+}