text: Title: Condense hyper parameter example
  Body: Can we shorten the example about [tuning hyper-parameters](https://scikit-optimize.github.io/notebooks/hyperparameter-optimization.html) while retaining the pipeline example?
  
  One approach would be to shorten the explanatory text and generally try and condense things. It is good to show off the pipeline feature to make people aware of it. Especially now that you can swap whole steps! At the same time we want to avoid the wall of text problem.
  