perfbook: a possible typo report

[Zhouyi Zhou <zhouzhouyi@xxxxxxxxx>]

Hi Paul and Akira

I found a possible typo in section 17.2.1,
"This section therefore critiques transactional memory's ability to so
interact,"

I tried to improve my English everyday, but I still can't tell whether
"so interact" is good or not good.

Thanks for your time
Reported-by: Zhouyi Zhou <zhouzhouyi@xxxxxxxxx>

Thanks
Zhouyi