feat: update citation

Author: Elscrux

CITATION.bib

@@ -1,6 +1,8 @@
-@article{eichhorn2025provideq,
-  title = {ProvideQ: A Quantum Optimization Toolbox},
-  author = {Eichhorn, Domenik and Poser, Nick and Schweikart, Maximilian and Schaefer, Ina},
-  journal = {arXiv preprint arXiv:2507.07649},
-  year = {2025}
-}
+@inproceedings{eichhorn2025provideq,
+  title={Provideq: A quantum optimization toolbox},
+  author={Eichhorn, Domenik and Poser, Nick and Schweikart, Maximilian and Schaefer, Ina},
+  booktitle={2025 IEEE International Conference on Quantum Software (QSW)},
+  pages={206--214},
+  year={2025},
+  organization={IEEE}
+}