Update H710-B0-full.md

[AJRepo]

Some have said they miss that they needed to record the SAS address for later. Making it more clear here.

[Fohdeesha]

Hi, thanks for the PR! However any additions here would need to be added to every perc model page so they all still match format and instruction wise, not just the h710-b0-full. Also, I don't think it is necessary in the end, as literally two lines below your suggested change I have a blurb saying exactly this:

"You also need to note the SAS address of the card from the above output so we can program it back later. Take a screenshot of the console, or otherwise note down the address so you can write it back at the end of the guide. It's not a huge deal if you lose it, but it's easiest to program back the original address instead of generating a new one."