minor: Don't list month in biblatex

README.md

@@ -129,11 +129,10 @@ If you use `qpbenchmark` in your works, please cite all its contributors as foll
 
 ```bibtex
 @software{qpbenchmark2024,
-  author = {Caron, Stéphane and Zaki, Akram and Otta, Pavel and Arnström, Daniel and Carpentier, Justin and Yang, Fengyu and Leziart, Pierre-Alexandre},
-  license = {Apache-2.0},
-  month = jul,
   title = {{qpbenchmark: Benchmark for quadratic programming solvers available in Python}},
+  author = {Caron, Stéphane and Zaki, Akram and Otta, Pavel and Arnström, Daniel and Carpentier, Justin and Yang, Fengyu and Leziart, Pierre-Alexandre},
   url = {https://github.com/qpsolvers/qpbenchmark},
+  license = {Apache-2.0},
   version = {2.2.2},
   year = {2024}
 }