Points to address in lesson

[ocaisa]

For https://fzj-jsc.github.io/tuning_lammps/index.html:

• Formatting seems to have some unusual indentation
• goes into too much detail on hardware generations (No need for PU generations)
• Addressing accelerators is good, but we should define what an accelerator is
• Download files required for the lesson is an unusual heading in the schedule
• Needs a readability review
• More careful use of vocabulary, e.g., I've never heard people using "workforce" to talk about node hardware