Rename next steps

[lgatto]

During last teaching meeting, Fred suggested the following:

Should we rename ‘Next steps’ with something like ‘Working with Bioconductor’, especially when the intro course is considered as an intro for the domain specific courses (RNA-Seq, single cell, proteomics, …).

I think this makes sense, especially of we want to consider the three bioc-intro/rnaseq/project as a unit.