fix missing sentence in readme

README.md

@@ -15,6 +15,8 @@ The datasets contains news article titles and is based on the dataset of the [On
 
 Have a look at German Text Embedding Clustering Benchmark ([Github](https://github.com/ClimSocAna/tecb-de), [Paper](https://arxiv.org/abs/2401.02709)) for more infos, datasets and evaluation results.
 
+If you use this dataset in your work, please cite the following paper: 
+
 ```
 @inproceedings{wehrli-etal-2023-german,
     title = "{G}erman Text Embedding Clustering Benchmark",