Update README.md

README.md

@@ -23,8 +23,8 @@ If using this model, please cite the following paper:
 title = {Surgicberta: a pre-trained language model for procedural surgical language}, <br />
 journal = {International Journal of Data Science and Analytics}, <br />
 year = {2023}, <br />
-doi = {https://doi.org/10.1007/s41060-023-00433-5}, <br />
-url = {https://link.springer.com/article/10.1007/s41060-023-00433-5}, <br />
+doi = { https://doi.org/10.1007/s41060-023-00433-5 }, <br />
+url = { https://link.springer.com/article/10.1007/s41060-023-00433-5 }, <br />
 author = {Marco Bombieri and Marco Rospocher and Simone Paolo Ponzetto and Paolo Fiorini}, <br />
 }
 </em>