Update README.md

README.md

@@ -21,7 +21,7 @@ The model's perplexity on a 250 MB random slice of csTenTen17 dataset is **42.12
 The repository includes a simple Jupyter Notebook that can help with the first steps when using the model.
 
 ## How to cite
-@unpublished{hajek_horak2022,<br>
+@unpublished{hajek_horak2023,<br>
   author = "Adam Hájek and Aleš Horák",<br>
   title  = "CzeGPT-2 – New Model for Czech Summarization Task",<br>
   year   = "2023",<br>