Format the "make libs" step to be more noticeable
Format the "make libs" step to be more noticeable

The "make libs' step was not boxed and highlighted
like the other command steps described. This is a minor
change, and one of preference, but I think it improves
overall readability.
SillyFreak/rust-demo-cortex-m4,antoinealb/rust-demo-cortex-m4,antoinealb/rust-demo-cortex-m4,nuft/rust-demo-cortex-m4,nuft/rust-demo-cortex-m4,SillyFreak/rust-demo-cortex-m4