Update README.md

Author: naderzare

README.md

@@ -139,4 +139,4 @@ You can modify the rpc port by adding the argument `--rpc-port [VALUE]`, where t
 ## Citation
 
 - [Cross Language Soccer Framework](https://arxiv.org/pdf/2406.05621)
-- Zare, N., Sayareh, A., Sadraii, A., Firouzkouhi, A. and Soares, A., 2024. Cross Language Soccer Framework: An Open Source Framework for the RoboCup 2D Soccer Simulation. arXiv preprint arXiv:2406.05621..
+- Zare, N., Sayareh, A., Sadraii, A., Firouzkouhi, A. and Soares, A., 2024. Cross Language Soccer Framework: An Open Source Framework for the RoboCup 2D Soccer Simulation. arXiv preprint arXiv:2406.05621...