Output misc with a more consistent style

[tueda]

@misc{chollet2015keras,
  title={Keras},
  author={Chollet, Fran\c{c}ois and others},
  year={2015},
  howpublished={\url{https://keras.io}},
}

gives

which is not in the style of articles etc.

cf. https://inspirehep.net/literature?q=keras%20and%20j%20jhep